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 (5,516 reviews)
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 (30)

July 7


We’ve got some exciting things going on that we need to share with our awesome community today!

We’re renewing our commitment to AAA Indie with ODD 2.0 you’re going to be able to see what we’re working on along with our progress towards the update. So check out our Trello Board! and watch as we progress towards each release date.

It’s finally time for the big Unity 5 upgrade! It was a big goal that kept showing its head with performance issues and now it’ll be answered. In addition to improved performance, we’ll be beginning new features and expanding on to Hell Week. We’ll be adding the unnerving killing machines (aka CTRs) into Hell Week, one capability that we can add in without destroying the framerate thanks to Unity 5! We’ll also be including a endgame for the final 4 Marines as well as DOORS! That last one may not sound as exciting but tactical shooters need doors unlike other games we won’t mention by name…

Our store page hasn’t changed a whole lot since going on Early Access so using feedback from you guys we have made some adjustments to help people make the best buying decision for them. A big change that deserves special notice is the price reduction! We’ve lowered the price for Interstellar Marines to reflect market conditions with all the new games that have come up on Early Access since the old prices were set.

If you’ve purchased the Regular Edition of Interstellar Marines you now have the Frontliner Edition. We’re doing this to give people who buy in Early Access something special a little further down the road, and so we have the “Regular Edition” title available for use when we get out of Early Access with the full release.

We hope you enjoy all the new changes and (insert inspirational comment here)

Your Team at Zero Point Software

9 comments Read more

June 26

Hell Week: Hotfix 3

Morning Marines,

We have another Hell Week hotfix to share with everyone. We now added more information and warning for elimination as well as an ability to rejoin during late join. We also fixed some major bugs that you have given feedback to! We hope you enjoy this hotfix and hope to see you in-game!

Your team at Zero Point Software

Update 19c - Hell Week: Hotfix 3

Version: 0.5.19c
Released: 26th June, 2015

What's New

ADDED: If a player leaves a Hell Week server, and has not been killed by another player or suicided, he can rejoin the game during the late join period
ADDED: Additional AI SARA announcements


UPDATED: When elevators start to move up, any players spawning in will spawn next to the top of the elevator
UPDATED: Adjusted the join time and late join time for Hell Week clusters
UPDATED: The 'You are up for elimination' message to only appear once the elimination phase starts
UPDATED: In spectator mode dead players are greyed out
UPDATED: In spectator mode, the name for all players appear when in freecam
UPDATED: Numerous additional small changes and fixes to all Hell Week maps


FIXED: "Inability for some players to connect to a Hell Week game when the join button is active"

Known Issues
  • The mission overview is currently a place-holder, and will be completed in a later update
  • Some crates may require several attempts to open
  • Players joining within a few seconds of a Hell Week starting may get an error that they cannot join. This is due to out-of-sync clocks. Please wait a few seconds and rejoin
  • Players may occasionally lose their inventory when moving between servers
  • Some new achievements and TP rewards may not work. We're investigating
  • The HUD names and kill messages will be clipped on aspect ratios that are less wide than 16:10
  • The game will stop updating when switching out of fullscreen in Windows (known bug in Unity 4). If you are on a moving elevator or platform, this will cause you to fall through it
  • View jittering may occur when jumping on lossy networks
  • Audio may cut off partially/completely on weapon/helmet sounds
  • Other players will seem to float above or interpenetrate while standing on a moving dynamic platforms (network smoothing will exaggerate this effect)
  • Potential to fall through elevator when moving
  • When joining an in-progress The NeuroGen Incident game, additional waypoints may be visible
  • Player may sometimes spawn with no ammo in one or both weapons. Reloading fixes this

You may need to restart your Steam client for it to recognize and download the update.

14 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
306 of 364 people (84%) found this review helpful
1 person found this review funny
31.6 hrs on record
Posted: June 12
Early Access Review
I like this game, I really do. Why won't I recommend it then? Let me explain.
Currently, the game is in decent shape, with nice gameplay, nice graphics, a reasonable amount of content for the price. The problem is, the developers say it will have so much more. The "vision" of IM is quite grand, and it would be great if it actually happened. I just doubt it will happen...

I mean, the progress is waaay too slow. Updates are few and far between (once every two-three monts), and when an update does comes out, new features are almost non-existant. Even many of the bug fixes that are stated as fixed on the changelog, are actually not fixed. It's like "This update, we are going to release the sprinting and fatigue system! In three months we will fix the broken sprinting and fatigue system! Three months after that, we will impliment our super advanced crouching system! AND, don't forget that after six more months we will add a flash light! Our game is uber-tactical with ultra advanced and realistic (unimplimented) skin system! Land sharks are just around the corner (and have been for the last year or so)! And of course, stay tuned, because we are going to take this game (advertised as a mainly SP/COOP game) and add a ♥♥♥♥♥♥ MP survival mode that no one wants, instead of focusing on the campaign or on adding more guns!"

They advertise their crouching and sprinting systems as "realistic", "advanced" and "revolutionary", and yet I do not see how they are different from any other FPS... And this is what gets to me. This dishonesty on the part of the developers.
If they would advertise the game as it is, and not throw in things they will get around to in about ten years, I would recommend it. It is pretty enjoyable as it is. But seeing as the developers are dishonest, and insist on misleading the players, I will not recommend this game!
Was this review helpful? Yes No Funny
172 of 207 people (83%) found this review helpful
1 person found this review funny
2.1 hrs on record
Posted: June 15
Early Access Review
Guys, I have been waiting for this game for almost 10 years. I've supported the development by purchasing the spearhead version of the game before it was on steam and afterwards I bought it again on steam to support further. I've purchased several bagdes of support from their website and even bought some of the company shares that were on sale a few years ago. I've seen this game go through many different development stages. The game simply is not what it had been advertised as back in 2006, or maybe it was 2005. I am not sure but at any rate I do not expect it to deliver anymore.

There are people who are happy with the current state of the game and I'm glad it gets support. However, as someone who has been waiting for this game since it was first announced I believe there are some things that have not been delivered. I do not expect a game that has been in develoment for this long to be the same game that it was announced as and frankly from what I've played so far that expectation might be correct.

I do not recommend this game to anyone, and before you decide to buy it I would like you to be aware that this game has been in develoment almost as long as Duke Nukem Forever and that you should look into it more before you decide that you truly want it.
Was this review helpful? Yes No Funny
62 of 84 people (74%) found this review helpful
1 person found this review funny
3.1 hrs on record
Posted: June 18
Early Access Review
I simply cannot recommend this game at present. The concept is good, but it seems the developers take forever to release updates and the game is still missing some extremely important mechanics to make it worthwhile. While the graphics and sound are fairly good there is not really much else to say in favour of the game at present.

- You cannot create your own servers. You are limited to a handful that the devs provide which are map/gametype locked. Their "reason" for not releasing the server-side files is that they are scared people are going to reverse engineer it. Utter ♥♥♥♥♥♥♥♥.

- Only 2 weapons that are very similar. Infinite ammo, no pickups in the game world.

- Enemy AI is sub-par at best and laughable at worst.

- Only 2 co-op missions (at the time of this review) - so not a lot of content if you buy the game for co-op instead of PvP or Player vs Bot.

- Some of the level design is wonderful, others may very well drive you to the brink of insanity due to poorly communicated objectives, a broken waypoint system and some truly atrocious level design.

- The tutorial doesn't even work. You get stuck at a door and cannot continue.

All-in-all, it's very lackluster. The sad thing is, they have the foundations for a great game here, but with devs that are taking forever and ignoring some massive features, I say pass on this one for now.

Jimbo Rating: 4/10
Was this review helpful? Yes No Funny
13 of 14 people (93%) found this review helpful
1 person found this review funny
4.2 hrs on record
Posted: July 6
Early Access Review
Had a shoot out with friends in a private co-op session last time I played, tried to play this week only to see that im apparently banned from every server, emailed support and got this back

" Your account was banned a few months ago for excessive team killing. We can remove you from this list by resetting your stats, but please be aware if your account appears on the excessive team kill list again we would have to permanently ban it."

10/10 bretty gude big brotha is watching u
Was this review helpful? Yes No Funny
46 of 76 people (61%) found this review helpful
1 person found this review funny
2.1 hrs on record
Posted: June 9
Early Access Review
This is by far the biggest mistake of a purchase i have ever made in my life. I bought the spearhead edition thinking maybe i could contribute to the designers of this game that originally looked really good.
PROS-The gfx, sounds and atmosphere is really nice
-Has a pretty good concept(lots of potential)

CONS- Forever in early access
- Lack of Everything (only 2 guns, litterally 1 or 2 playable online rooms..)
- The content that is available is very bland and repetative.
- I have a lot of problems with the controlls bugging out and not being able to move at times.

The Devs are extremely defensive about complaints and dont want to hear anybodys ♥♥♥♥, instead of taking it as constructive critisism. For how long this game has been in development, its really not going anywhere and seems like it just stopped and is completely deserted. I am trying my hardest to see if steam can refund this for me. Its infact so bad that i didnt give any friend my FREE copy of the game.
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