NEW HELL WEEK UPDATE - Interstellar Marines resurrects the old school tactical FPS, offering a unique blend of co-op, role-playing*, and nonlinear gameplay. Play co-op or multiplayer on servers around the world.
User reviews: Mostly Positive (6,027 reviews) - 70% of the 6,027 user reviews for this game are positive.
Release Date: Jul 2, 2013

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“We have this crazy idea that an independent game developer can develop something the size and quality of a AAA game, by having the community take the role of publisher. We call this concept AAA-Indie. This gives players the game they want, instead of the game a greedy publisher wants them to have. We know Interstellar Marines is going to take a long time to make, after all we’re making a AAA game without the size or resources of a AAA studio. So rather than toiling away behind closed doors we want to spend this time with you, the player, and share the experience all the way from pre-alpha to the release version.”

Approximately how long will this game be in Early Access?

“This is for the love of the game, not the money. We'll be in Early Access until we have delivered our ambitious vision or Valve decides to shut down Early Access. So... a long friggin time.”

How is the full version planned to differ from the Early Access version?

“Spearhead and Frontliner Editions will only be available in Early Access for those brave enough to support our quest to create a AAA-Indie game! For the full version we plan on having a Regular and Deluxe Edition. As far as features our plans for the full version include:

  • First Person Simulation
    A razor-sharp focus on creating a truly immersive First Person Simulator via distinct graphics, audio, and gameplay.
  • Tactical Co-op
    The entire game experience designed from the ground up to support up to 4 players in co-op, with true cooperative interaction.
  • Progressive Role-Playing
    Flat and classless progressive character development and skill system that is not dumbed down for consoles.
  • Nonlinear Game Design
    Open and dynamic game world that always presents a multitude of tactical options for navigating the environment.
  • Customizable Arsenal
    A comprehensive selection of weapon models and types, extension upgrades and equipment options, allowing on-the-fly choice in each tactical situation.
  • Thinking AI
    Enemies that react to input from you and the surrounding game world. We would rather have one smart enemy than five stupid ones.
  • Believable Science Fiction
    Realistic and rich sci-fi environments, ranging from claustrophobic space stations to large outdoor worlds.
  • Interactive Storyline
    A cinematic narrative centered around first contact with another sentient species, where your choices and actions will have consequences.

The full version will be more SP/Co-op focused than the current Early Access version where we are implementing and testing new mechanics primarily in a PvP multiplayer environment.”

What is the current state of the Early Access version?

“The game is in pre-alpha and players can expect to experience bugs, missing features, incomplete content, and some game breaking issues. Still, we have a couple community members with over a thousand hours in-game, and many with hundreds of hours. In the portion of the game currently available you are training in a top secret facility 2km beneath Groom Lake Nevada. These are the features you can experience right now:

  • Hell Week Event
  • 2 SP/Co-op Campaign Missions*
  • 4 Difficulty Levels
  • 5 Challenge Missions
  • 9 Multiplayer Maps
  • Dynamic Environment Effects
  • 3 PvP Game Modes
  • 100% Dynamic Lighting
  • Destructible Light Fixtures
  • Full-body Character Simulation
  • Visor Affected by Fog, Dust, and Rain
  • Spectator Mode
  • Movie Mode
  • Playground Mode
  • 3 weapons**
  • Tactical Laser
  • Tactical Flashlight
  • Ragdoll Physics
  • 28 Steam Achievements
  • Dedicated Servers Worldwide
*(Currently available as stand-alone missions)
**(pistol currently uses placeholder model)

We have a small but active multiplayer community. Look HERE to see when the most people will be on for you to play with, it is usually during the evenings in North America and Europe. There is also a budding esports scene at that we sponsor.”

Will the game be priced differently during and after Early Access?

“We intend for the price to follow the value of the game. Expect it to gradually rise as we ship new content, but we may need to lower the price on rare occasions to correct for market conditions.”

How are you planning on involving the Community in your development process?

“The community can follow our progress on the Trello Board and vote for features they want to see. They will also be able to report and track bugs once we choose a bug tracking software. Players can also interact with the developers on the forums, in bi-weekly community get-togethers on our TeamSpeak Server, and at hosted esports events as soon as game features support it.”
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Buy Interstellar Marines

Early Access to Interstellar Marines, including all future updates and expansions.

Buy Interstellar Marines - Spearhead Edition

Early Access to Interstellar Marines including all future updates and expansions + Join the Spearhead unit (unique honorary game profile) + Your username in the Hall of Honor and your name in the credits of the game + Digital download of the Interstellar Marines: The Beginning soundtrack and all future soundtracks + Digital download of art book when it’s ready + Get 1 extra Interstellar Marines Steam Key to gift to a friend.

Buy Interstellar Marines 4-Pack

Get one copy for yourself and give the other three to friends!

Buy Interstellar Marines - Upgrade to Spearhead Edition

Interstellar Marines - Spearhead Edition Upgrade


Recommended By Curators

"Nice Early Access First person tactical shooter game with more to come. Solid game; Campaign, Co-op, Multi-player with lots of fun and things to do."
Read the full review here.

Recent updates View all (36)

November 11

Update 23: Hotfix 1

We now have a big hotfix ready for you guys. We heard all your feedback, bug reports, and are tackling the biggest issues of this update. Below is the changelog and we’ll be monitoring how the update is faring. There are still some issues we’re working hard on fixing like the random crashes and the occasionally clipping through the world. Those two issues are top priority for us and we’ll be trying to crack down on these specifically.

Thank you all for patiently waiting and we hope you enjoy it!

Your team at Zero Point Software

Update 23 Hotfix 1
Version: 0.5.23
Released: 11th November, 2015

What's New
ADDED: Last 20 messages and message of the day to global chat
ADDED: Join button to global chat. When a player joins a server, a blue join button appears in the chat. Client-side only, and limited to max 3 at a time
ADDED: On/off button for XBOX controller added to menu settings
ADDED: Run/walk when strafing with an XBOX controller
ADDED: Chat log to global chat

UPDATED: Industrial Hell Week map with restrictions to roof access
UPDATED: Weapons handling updated and tweaked
UPDATED: Removed CTR killed messages from Hell Week
UPDATED: Player colour in global chat to match in-game chat colour

FIXED: "Steam leaderboards not updating"
FIXED: "Steam achievements not working"
FIXED: "New steam achievements"
FIXED: "Back packs not being correctly removed in Hell Week"
FIXED: "All aboard trigger not working in several coop missions when a player leaves the server when dead but not bled out"
FIXED: "Framerate drops caused by CTRs going into a loop which caused them to attempt to rotate at an infinite speed"
FIXED: "Assault on Starcrown Aerospace"
FIXED: "Excessively large servers logs which could cause server crashes"
FIXED: "Negative player scores in Hell Week"
FIXED: "Several HUD elements not visible in different resolutions"
FIXED: "Capturing a zone audio notification only audible when looking at the centre of the zone"
FIXED: "Max chat server clients set too low"
FIXED: "Chat server requesting unavailable RPC from client"
FIXED: "Audio notifications when firing at a friendly or enemy"
FIXED: "Number keys not switching weapons when XBOX controller plugged in"
FIXED: "Zoom not working correctly when XBOX controller plugged in"
FIXED: "Stuck in bleed out"
FIXED: "Randomly moving between players when spectating when dead in multiplayer. NOTE: this is untested"

22 comments Read more

October 30

Update 23: Coop in Hell Week

Update 23 marks the 3rd update in our new monthly update cycle! Technically U23 should be released the first week of November for monthly updates, but you’re ok if we get an update out early right? Now we have a bit more time to work on U24 before the (fingers crossed) first week of December.

HUD/UI Improvements
We’ve added more useful information to your hud and made it all around cooler with hit markers, teammate status symbols, and keep the information on-screen even when you ADS. It's now fully converted to Unity 5 which means we can add effects like blurry vision from exhaustion or suppressed fire, emp grenade scattering in the visor etc. Lots of cool things we can do in the future.

Improved Hell Week with teammate revive to reward teaming up even more, points are now shared among teammates requiring less thought about whose turn it is to get that gold box, and we’ve also got VOIP working again! Remember the real-time voice porting demo you saw from forever ago? Well we got that working so now you’ve got team voip and can also open your helmet and talk to any player in proximity to you.

Ever since upgrading the game to Unity 5 our current foliage and vegetation assets have not been fully supported. Therefore we have now started adding new assets called SpeedTrees! First map to get tested is Rupture and over time we'll add them on all maps.

We have added a few details to the CTRs; when it is dark they will now hunt and blind you with their tactical light and they also use a laser sight to assist with aiming. Speaking of lasers, remember how it used to switch off whenever you aimed your weapon? Even though it didn’t switch off to other players in 3rd person? Well now it stays on the whole time, making the transition from laser aiming from the hip to ADS a little smoother.

We’ve also got a lot of general improvements. Spawns are now protected by shields to help mitigate the problem with spawn camping until we are able to iterate on this further. We’ve fixed some sound issues, and your weapon configuration is now saved for when you’re revived or respawned!

We’re beginning to add more visibility to the progression elements in the game in preparation for item unlocks and RPG/skill elements. Detailed patch notes to follow.

Game Roadmap
As many of you know the part of the game we are currently working on is known as Prologue, and follows the player through training to be an Interstellar Marine before getting into the “real” story. Some are concerned we’ve shifted focus to pvp, and don’t understand why we’re creating coop using pvp instead of coop. Short version; spoilers. It’s a means to an end type situation.

That is where the crux of the problem is, we want you to have the best experience possible and not ruin the narrative of the game by revealing the story before the supporting elements are in place. But we still need to put in new tech that will be needed for the campaign while giving players something to do.

Here’s our strategy. First we create the tech foundation while funding development through Early Access sales. Once we have the immersion right, the progression and customization systems in place, more weapons, and the unlocks all planned out, then we start on the big campaign. We’ll keep expanding prologue in logical ways to keep people occupied while we develop the campaign, and will probably deliver it in chunks. Chapters if you will.

We don’t have a specific timetable for progress, time spent doing a thorough analysis to come up with a realistic and accurate estimate is time better spent actually working on the game. We know where we’re going, we know how to get there, and we’ll take it one update at a time.

Thank you for hanging in there and supporting us through development. We know it’s taking longer than some would like, but we’d rather get things right the first time to give you the best Interstellar Marines coop campaign experience right out of the gate.

Patch notes are available here in full:

Your team at Zero Point Software

What's New
ADDED: Ability to revive players in Hell Week
ADDED: VOIP to Hell Week teams, when in same zone as other team members
ADDED: Hell Week ends when 3 teams are left. Note: a lone wolf player counts as a team
ADDED: Teams in Hell Week now share points between players
ADDED: Players respawn in new zone when killed during grace period in Hell Week
ADDED: Huge HUD update including a number of new icons, sprites and changes
ADDED: Three new Hell Week-related Steam Achievements
ADDED: Initial, very early, support for Xbox gamepad. This is experimental and likely contains issues/bugs
ADDED: TPs and TR info to right hand side of main menu (need to be over 1280 width resolution to see)
ADDED: Ability for coop servers to run the same game mode and game type on the same server
ADDED: Global chat in main menu. By default, press T to toggle
ADDED: Can no longer aim when crouched if blocked by an object
ADDED: Weapon settings are remembered after death, and on collected CTR weapons
ADDED: Speedtrees to Rupture
ADDED: AR CTRs use a laser when aiming, AR+SMG CTRs use laser when shooting
ADDED: List of team mates in the HUD when teamed up in Hell Week
ADDED: Numeric input for sensitivity sliders

UPDATED: Weapons' FOV, recoil, damage, handling, dropoff, magnification etc. have been tweaked
UPDATED: Hell Week teams to have a max of 4 members
UPDATED: Spawn protection to all multiplayer maps
UPDATED: Quick join to add confirmation pop up showing game mode, and high ping if it is enabled in the settings
UPDATED: Operations audio with reverb in spawn tunnels
UPDATED: On-death fade-to-black screen
UPDATED: Respawn time in Hell Week grace period is now 5 seconds
UPDATED: Nav mesh on all Challenge maps
UPDATED: Several server stability fixes, especially on Starcrown
UPDATED: Wetlands with new nav mesh and other tweaks
UPDATED: Starcrown with several fixes
UPDATED: Operations Survival and MP maps with new modules and various fixes
UPDATED: Hell Week server browser now shows 'Server starting...' instead of join button when there is a time desync between server and client
UPDATED: Resolution screenshot with different sizes, plus button to open screenshot folder
UPDATED: Removed completing The NeuroGen Incident Steam Achievements on easy, normal and hard difficulties

FIXED: "VOIP in Coop"
FIXED: "Picking items up in Hell Week should work first time the majority of the time"
FIXED: "Changed max number of players coop quick join looks for to 2 from 1"
FIXED: "CTRs to minimise them being stuck on items or terrain"
FIXED: "Most instances of server browser returning to the wrong server browser page"
FIXED: "Footstep audio looping when stood still"
FIXED: "Nucleus so the escape door is not locked by default"
FIXED: "Light handler and light intensity issues which were causing performance losses"
FIXED: "Crates which were in, or on, water in Hell Week have been fixed"
FIXED: "Games no longer return to the incorrect server browser"
FIXED: "Spawn bug in Team Domination"
FIXED: "Flashing flashlights no longer flash improperly"

17 comments Read more
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Interstellar Marines

Frontliner Edition is an Early Access exclusive. Your Purchase includes:

  • Early Access – be part of the development of Interstellar Marines and provide your feedback and suggestions as we expand the game update after update.
  • Frontliner identity - An early access exclusive profile on our site and in Interstellar Marines.*
  • Upgradable - No need to re-buy, you can own Spearhead Edition with a simple upgrade.
  • All In – receive all future updates and expansions completely free of charge.
*Not available yet

Interstellar Marines - Spearhead Edition

Spearhead Edition is an Early Access exclusive. In addition to Early Access to Interstellar Marines (including all future updates and expansions), the Spearhead Edition includes:

  • Spearhead identity – A unique honorary game profile that with time will grant you access to special skins, helmets, and weapons. (does not alter gameplay).*
  • Hall of Honor & Credits – Your name will be acknowledged in a special in-game Hall of Honor and you’ll also get your name in the credits.*
  • Digital Soundtracks – Download the Interstellar Marines: The Beginning soundtrack as well as all future soundtracks as they are released.
  • Extra Steam Key – You’ll receive an additional copy of Interstellar Marines to trade or gift to a friend.
  • Access to Beta Builds of New Updates – Occasionally Spearhead owners receive access to early beta builds of new updates before they're released publicly, allowing you to experience new content in advance!
  • Digital Art Books – Download digital PDFs released periodically, filled with high resolution concept art, screenshots and behind the scenes information.*
  • Digital Concept Art – You’ll receive early copies of concept art and other images in a special Spearhead folder on your hard drive.
*Not available yet

Steam Greenlight

Making The Game

We'll be posting development progress on our Trello board, allowing you to see what we're working on and give some input on what we're doing and what you'd like to see.

About This Game

Interstellar Marines resurrects the old school tactical FPS, offering a unique blend of co-op, role-playing*, and non-linear gameplay. Set in a believable future, you take on the role of an elite operative handpicked to join Project IM, a top secret military program being assembled to protect mankind from all dangers outside our solar system.

Interstellar Marines is inspired by movies such as Aliens, Starship Troopers and Final Fantasy; and games such as Half-Life, System Shock 2, and Rainbow Six 3: Raven Shield. Interstellar Marines is all about evolving the FPS recipe with all the inspirations we've assimilated since the birth of the genre. Our goal is an evolutionary leap forward driven by our compulsive interest in science fiction, role-playing, military realism, and respect for first person immersion.

*role-playing not yet implemented

Welcome to Project: IM

Since man first raised his head to the stars above, he has dreamed of conquering space. Interstellar Marines is the age old dream come true. It is the dawn of the 22nd century, a time of great hopes and expectations. The discovery of a new and inexhaustible well of power known as Zero Point Energy has revolutionized space travel. Man has escaped the confines of Mother Earth, and gone on to colonize the solar system.

But far away from public awareness an ambitious military project has already taken Man beyond the final frontier, and into the regions of the stars. The powerful Interplanetary Treaty Organization, ITO, is secretly constructing the first human settlement in another star system. You are a new member of the Interstellar Marines, a secret battalion within the ITO special forces created to protect humanity against potential threats from the confines of the unknown universe.

Now gear up Marine, we’ve got training to do! Welcome to Project IM.

New Hell Week Event

Featuring 9 New and unique areas where 64 players battle until only 4 are left standing! This event runs every 3 hours in each timezone, so there’s always one somewhere in the world starting at the top of every hour. We also have a Steam Leaderboard for Hell Week here which tracks Combat Points globally, monthly, and survivors of Hell Week. We'll let you know more about Hell Week Finals when it’s ready.

7 Singleplayer/Co-op Missions

Play 5 co-op and single-player missions against unscripted AI with dynamic environment effects or two pivotal missions inside the Interstellar Marines universe, The NeuroGen Incident and Assault on Starcrown Aerospace. Play singleplayer or co-op with up to three friends in intense action with more co-op and singleplayer missions to come!

9 Unique Multiplayer Maps Across 3 Game Modes

Take your friends out in Deadlock, Deathmatch, and Team Deathmatch on maps featuring dynamic environment effects such as time of day, rain, thunder and lightning, emergency lighting, fire alarms, moving platforms etc.

Realistic Simulation

With a physics-based dynamic character controller there are no floating hands, and you can even see your feet! The physically present combat helmet has a HUD projected onto the visor and is affected by dust, rain, fogging, and damage. Aim down the sight for the long shots and use the tactical laser to assist aim when hip firing, as there are no artificial crosshairs to break immersion. Use the intuitive crouch and cover system; spacebar (default) peeks over cover, and looking down leans you forward to see over ledges. You can also shoot out the lights and prowl in darkness, or use the tactical flashlight if you’re afraid of the dark.

We hope you enjoy the game, and look forward to developing it with you as we progress through Early Access!

Your team at Zero Point Software

System Requirements

Mac OS X
SteamOS + Linux
    • OS:Windows XP SP3 or Windows Vista
    • Processor:2.4 GHz Dual Core
    • Memory:2 GB GB RAM
    • Graphics:Nvidia Geforce 8800 GT / ATI Radeon HD 4770
    • DirectX®:9.0c
    • Hard Drive:3 GB HD space
    • Sound:DirectX 9.0c Compatible
    *1 map, Neurogen Incident, temporarily requires 64-bit OS and 4 GB RAM until it is optimized
    • OS:Win 7 or later
    • Processor:2.4 GHz Quad Core
    • Memory:4 GB GB RAM
    • Graphics:Nvidia Geforce GTX 280 / ATI Radeon HD 5830
    • DirectX®:9.0c
    • Hard Drive:3 GB HD space
    • Sound:DirectX 9.0c Compatible
    • Other Requirements:Broadband Internet connection
    *1 map, Neurogen Incident, temporarily requires 64-bit OS and 4 GB RAM until it is optimized
    • OS:10.7.5 (Lion)
    • Processor:2.2 GHz Intel Core 2 Duo
    • Memory:2 GB RAM
    • Graphics:Nvidia Geforce 8800 / ATI Radeon HD 3850
    • Hard Drive:3 GB HD space
    *1 map, Neurogen Incident, temporarily requires 64-bit OS and 4 GB RAM until it is optimized
    • OS:10.8.2 (Mountain Lion)
    • Processor:2.4 GHz Intel Quad Core
    • Memory:4 GB RAM
    • Graphics:Nvidia Geforce GT 120 / ATI Radeon HD 4870
    • Hard Drive:3 GB HD space
    • Other Requirements:Broadband Internet connection
    *1 map, Neurogen Incident, temporarily requires 64-bit OS and 4 GB RAM until it is optimized
    • OS:Linux
    • Processor:2.4 GHz Dual Core
    • Memory:2 GB GB RAM
    • Graphics:Nvidia Geforce 8800 GT / ATI Radeon HD 4770
    • Hard Drive:3 GB HD space
    *1 map, Neurogen Incident, temporarily requires 64-bit OS and 4 GB RAM until it is optimized
    • OS:Latest version of Ubuntu (14.04)
    • Processor:2.4 GHz Quad Core
    • Memory:4 GB GB RAM
    • Graphics:Nvidia Geforce GTX 280 / ATI Radeon HD 5830
    • Hard Drive:3 GB HD space
    • Other Requirements:Broadband Internet connection
    *1 map, Neurogen Incident, temporarily requires 64-bit OS and 4 GB RAM until it is optimized
Helpful customer reviews
32 of 42 people (76%) found this review helpful
38.5 hrs on record
Posted: November 13
Early Access Review
This game has been in development for more than 6 years now, and it doesn't seem that the end is anywhere in sight.
This is becoming a sort of pyramid scheme, where people who already bought the game recommend it to others just to keep the development going. :-/
The developer has recently started releasing monthly updates, but those updates are mostly void of real content; they include only minor changes like tweaking the weapon recoil, or changing the HUD display font.
The developer ignores any questions about the release date, and doesn't reveal anything about the single-player campaign, saying that its a surprise, or that everything's a "means to an end", or something vague of that sort.

My guess is, sadly, that the money will run out before the game will ever be finished. I therefore would not recommend anyone buy this game in its 'early access' from.
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25 of 35 people (71%) found this review helpful
1 person found this review funny
0.3 hrs on record
Posted: October 27
Early Access Review
So far, this is a very nice techdemo with a few placeholder missions. With some content it could become a game some day, but the devs dont really seem to spend any time working on new content, instead working on balancing issues and small details.
Since i bought this game the target of development has been moved around a lot, and the final product will most probably not be anywhere close to the vision presented by the dev team.
In the time this game was being made an unbelievable amount of much more interesting and complex games have been developed. It seems pretty obvious that they bit off way more than they could chew and in the end the result is now a pretty good framework for a coop tactical shooter but not very entertaining on its own.
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15 of 19 people (79%) found this review helpful
73.3 hrs on record
Posted: November 16
Early Access Review
I know this game is on active developing. There's not enough financing, but why so slow? 3 types of weapons, no melee, one type of AI enemy and not much options to play. After 4 years (or more, not sure) we got jumping, new SMG model, AR and "pistol", Hell Week and couple of levels.
I understand it's small team with limited finances, but really, before to bring more gameplay content, just give us more weapons to use full combat experience. 4 years of crude shooter mechanics and nothing more.

Anyway, it's EARLY ACCESS game, you paying for it because you want to support developers. If you seeking for play, do not wait from this one anything genious! Pay if you really interest on this, in other case just pass by.
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14 of 19 people (74%) found this review helpful
1 person found this review funny
2.6 hrs on record
Posted: November 12
Early Access Review
-2 years later, still no sharks (which was the main reason I even bought it),

-Development is super slow, update after update with very little content addition

-Gunplay and general control feel is boring and ridged

-The multiplayer is stale, simple, feels empty with no replay value

-Although the lighting is very well done the rest of the games textures are very basic

-Sound effects are very generic and not well synced to triggers

Had a few fun moments in multiplayer with my buddies over the past year but honestly this game seems like its going nowhere. I still have no idea why we are seeing this stale boring robots instead of sharks and creatures as promised in levels, seems like a cheap filler. I've had the pleasure of watching several other early access games come togeather over the years and unfortunately this is stuck in the past and based on the latest updates its going to remain there.

Good try, Good Idea, but shes dead
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5 of 6 people (83%) found this review helpful
1.8 hrs on record
Posted: November 10
Early Access Review
Too boring to mince words. The premise and initial impression I got were quite good, but the actual gameplay was tedious, repetitive, and poorly paced - even in co-op. I hope the final release is a lot better fleshed out mission wise.

The guns were alright for a new IP, but the movement could be made a lot smoother.
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