UPDATE 26 AVAILABLE - Interstellar Marines is an immersive tactical sci-fi First Person Simulator in the making, offering a unique blend of tactical gameplay, dynamic environments and non-scriptet AI. Play Singleplayer or Co-op/PvP on servers around the world.
User reviews:
Mostly Negative (44 reviews) - 29% of the 44 user reviews in the last 30 days are positive.
Mixed (3,411 reviews) - 66% of the 3,411 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?

“Early Access have allowed us to develop the core features and technology platform of the game of our dreams in the making, which would not have been possible otherwise. We're at a point now where we can finally start to attract the attention of publishers/investors and complete the game; kickstarting this ambitious franchise. You can follow our progress & recommend publishers for us to work with on our Publishers & Investors Info/Status sheet.”

Approximately how long will this game be in Early Access?

“In June 2016 we started looking for a publisher/investor to fund the completion of Interstellar Marines: Aspiration and help us release out of Early Access on Steam and port it onto PS4 and Xbox One consoles. Once we have finalized an investment/publishing agreement, we estimate 17 months from that date until Interstellar Marines: Aspiration is completed. We extremely honored to spend this time with you, the player, and share the experience all the way from pre-alpha to the release.”

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 make the game of our dreams. 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. These are the features you can experience right now:

  • Wargames (Sandbox Combat Arena)
  • 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.”

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.”
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Buy Interstellar Marines

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

Buy Interstellar Marines 4-Pack

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

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.

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Recent updates View all (40)

December 22, 2016

Update 26 - Breach Operations

Good Morning/Afternoon Dear Community,

This is the first update in quite some time, and we've all been waiting for it!

Update 26 introduce the first mission instance inside Wargames. A mission which takes place in the treacherous corridors of Operations in full lockdown. Hordes of defective and patrols of submachine gun wielding CTRs is all that stands in the way of you (or your team) and the loot filled treasures enclosed beneath ... oh yeah, and 5 power relays at random locations!

Update 26 also features a few minor bug fixes, several key improvements and various tweaks to e.g. HUD systems, foliage rendering, new loot crates, global messaging, increased performance in Wargames and more (Please check full changelog below for details).

The Annual XMayhem multiplayer gamemode is back once again; allowing you to unlock our two very special seasonal xmas achievements for the duration of the holidays.

From all of “us” here at Zero Point Software, “we’d” like to wish you a Merry Christmas and a Happy New Year. Thank you for supporting the game!

ZPSHicks, last survivor of Zero Point Software

Update 26 - Changelog:

What's New

ADDED: Operations mission instance to Wargames
ADDED: System setup of mission crates, waypoints and access elevator platforms to gain access to Operations
ADDED: Steam leaderboards to the Wargames server browser menu
ADDED: Option for inviting players from chat lobby into Wargames (joining the same team and spawning close to each other)
ADDED: Backpack icon in Mission Overview at location of backpacks dropped with +500 CPs
ADDED: Chat announcement of CPs amount and zone location if player is killed with +500 CPs
ADDED: Overhead icon for team members in different zones in Wargames
ADDED: Revamped loot crates (model details, animation and textures) - Made by Hexe the Insane and Katrina the Insane (Thanks a million guys!)
ADDED: Dynamic thumbnails in Wargames server browser menu
ADDED: Support from streaming text and images from URL into menu
ADDED: Simple "falling out of map" trigger pickup setup to all zones in Wargames
ADDED: Cull groups and cull group triggers to all zones in Wargames except Jungle (20% boost in performance)
ADDED: Backpack beacon light and sounds to dropped backpacks
ADDED: Support for instantiating different waypoint icons
ADDED: SARA helmet announcements 60 seconds before a drop crate lands in Wargames
ADDED: SARA globally announces power state of Operations in Wargames
ADDED: Waypoints and power system to loot crates
ADDED: Defective CTR spawnbox to Sandbox
ADDED: Simple cardboard target setup to Sandbox
ADDED: Mission crate and small Operations access elevators system setup to Sandbox
ADDED: Containment field to Sandbox (good for testing suit system shutdowns)
ADDED: Respawn protection from CTRs in Wargames
ADDED: Main menu now shows how many achievements you have out of all
ADDED: Best Clan is now WaR-IM (Congrats guys!)


UPDATED: Trees and foliage shader to work with Unity 5 (Removing black edges and receiving correct lighting)
UPDATED: Trees and foliage billboard shader to work with Unity 5 (removing ugly edge in fog)
UPDATED: Global chat log is kept when switching zones in Wargames
UPDATED: Increased player revive-able timer to 60 seconds (from 30 seconds)
UPDATED: HUD revive messages is only displayed for teams in Wargames, everyone else see them in the chat
UPDATED: Kill messages removed from HUD, except from team players in same zone in Wargames
UPDATED: HUD correctly shut downs all intended elements when suit is offline or helmet is open
UPDATED: Restyled Mission Overview and added Operations access icons to the map of each zone
UPDATED: Replaced Hell Week with Wargames theme across the game (screens, audio, text and UI
UPDATED: Stamina is regained 150% faster when fully exhausted
UPDATED: Lowered breath audio volume when fully exhausted by 25%
UPDATED: Increased HUD compass width by 20%
UPDATED: Wetlands night moonlight and ambience light color 50% more bright
UPDATED: Jungle dusk weather mode is now more viberant and red in tones
UPDATED: Removed windows from 90% of all buildings in Wargames
UPDATED: Rebaked navmesh in all zones for more accurate pathfinding
UPDATED: Retry count in mission/challenges menu selection
UPDATED: Playing Lone Wolf the HUD scoreboard says DELTA instead of Player
UPDATED: Backpack pickup speed 2x faster
UPDATED: Loot crate unlock speed 2x faster
UPDATED: Weapon pickup speed 2x faster
UPDATED: CTR and Marine 3p walk sounds 2x volume
UPDATED: Restyled global chat UI so chat messages is shown against the dark edge of the helmet for better clarity
UPDATED: Increased brightness of flashlights 1p/3p (from 1.6 to 2.5)
UPDATED: Drop crates in Wargames drops every 5 minutes in one random zone
UPDATED: Tweaked the vignetting image effect to be more realistic and darker edges when aiming weapon for increased immersion
UPDATED: Simplified emmisive mask (shown on combat suit of team players)
UPDATED: Removed low pass muffling of suit audio system (SARA and audio logs)


FIXED: Invert mouse/gamepad Y-axis in input settings
FIXED: HUD Interaction brackets not showing when suit system was offline
FIXED: HUD WARN message was not turned off if opening the helmet when the suit is offline
FIXED: CTR reload sound radius
FIXED: Rocks in zone connection tunnels where not blocking "sunlight" flares
FIXED: Waypoints staying in Welcome to Project IM introduction mission

Known Issues
  • Players may sometimes fall through the floor of a map (Unity 5 bug)
  • The game will stop updating when switching out of fullscreen in Windows. If you are on a moving elevator or platform, this will cause you to fall through it. If you are in a Party, this will disconnect you from the Party
  • View jittering may occur when jumping on lossy networks
  • Other players will seem to float above or interpenetrate while standing on a moving dynamic platforms (network smoothing will exaggerate this effect)
  • The gamepad implementation is early and experimental, so may cause issues
  • When viewed up-close, some CTR heads may increase in size
  • Standing in a doorway when the door closes may result in the player being pushed vertically
  • The HUD names and kill messages will be clipped on aspect ratios that are less wide than 16:10

158 comments Read more
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About This Game

Interstellar Marines is an immersive tactical sci-fi First Person Simulator in the making, offering a unique blend of tactical gameplay, dynamic environments and non-scriptet AI. Play Singleplayer or Co-op/PvP on servers around the world.

Interstellar Marines is inspired by movies such as Aliens, Starship Troopers and Saving Private Ryan; and games such as Half-Life, Deus Ex, System Shock 2, and Rainbow Six 3: Raven Shield.

Interstellar Marines is all about evolving the FPS recipe with 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.

Interstellar Warfare Initiative

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 special forces soldier training to join the Interstellar Marines, a part of the secret Interstellar Warfare Initiative being established to protect humanity against potential threats from the confines of the unknown universe.

It's time to evaluate the Interstellar Warfare Initiative and program evaluations are taking place at The Vault, ITO’s most advanced military facility on Earth enclosed deep beneath Groom Lake, Nevada. Supervised by SARA, ITO’s central neural network AI, SARA will program artificial weather and advanced combat training robots to test each warfare initiative to the limits.

This is where the game begins ...

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!

Wargames (Sandbox Combat Arena)

Unique sandbox combat arena in the making. Wargames is played across 9 distinct interconnected environment zones allowing 64 players to join in the scavenge for combat points, playing alone or in co-op. We have a special Wargames Steam Leaderboard which tracks Combat Points globally, monthly, and survivors of Wargames.

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
Customer reviews Learn More
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