Interstellar Marines

Interstellar Marines

Zero Point Software · July 2, 2013 · Action, FPS, Indie, Tactical, Co-op

Buy the Interstellar Marines key for Steam from Gameseal at $2.14 — the cheapest of 8 stores we compare.

PC
Mixed53% · 7,8742playing now
Best price 87 Lowest tracked
$2.14-79%
⭐ lowest tracked
Gameseal Buy at Gameseal

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Where to buy Interstellar Marines — official stores

Steam
Steam
Standard Edition · Steam
$9.99
Buy
Humble Store
Humble Store
Standard Edition · Steam
$14.99
Buy
GamersGate
GamersGate
Standard Edition · Steam
-10%
$17.09
$18.99
Buy

Cheapest Interstellar Marines keys — keyshops

Keyshops are third-party marketplaces — keys are resold and can be region-locked or a different edition. Check the listing's region & edition before buying.

Driffle INC
Standard Edition · Steam
$2.23
Buy
Gameseal
Standard Edition · Steam
$2.14
Buy
Eneba
Standard Edition · Steam
$2.31
Buy
Kinguin
Standard Edition · Steam
$2.40
Buy
CJS CD Keys
CJS CD Keys
Standard Edition · Steam
$2.80
Buy

Some store links are affiliate links — playze may earn a commission at no extra cost to you. It never changes the price you pay, and the cheapest confirmed price is always shown in the Best price box above.

Interstellar Marines price by region

Interstellar Marines costs £1.63 in the United Kingdom, €1.87 in Europe (EUR), $2.14 in the United States, $2.14 in Georgia (USD), zł8.90 in Poland, CA$11.49 in Canada, NZ$11.99 in New Zealand, R$12.59 in Brazil and A$13.99 in Australia right now.

Cheapest Interstellar Marines offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
United Kingdom £1.63 −77% £6.95 £1.63 6
Europe (EUR) €1.87 −77% €7.99 €1.87 7
United Statesyour region $2.14 −79% $9.99 $2.14 8
Georgia (USD) $2.14 −66% $6.29 $2.14 8
Poland zł8.90 −75% zł34.99 zł8.90 5
Canada CA$11.49 CA$11.49 — 3
New Zealand NZ$11.99 −10% NZ$11.99 — 3
Brazil R$12.59 −37% R$19.99 R$12.59 4
Australia A$13.99 −10% A$13.99 — 3

Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.

Trailers & screenshots

Watch the Interstellar Marines trailer →

About Interstellar Marines

✦ AI summary

Command an elite special forces unit through tactical sci-fi combat missions with unscripted AI, dynamic environments, and immersive first-person realism inspired by classics like Aliens and Rainbow Six. Fight solo or co-op against intelligent enemies, compete in large-scale sandbox wargames, or face off in multiplayer across destructible maps with no HUD crosshairs breaking immersion.

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-scripted 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!

FOR THE LOVE OF THE GAME,
Your team at Zero Point Software

Interstellar Marines — game info

Platforms
Windows, macOS, Linux / SteamOS
Player modes
Single-player, Co-op, Cross-platform multiplayer
Controller
Partial controller support
PC Game Pass
Not included

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

✦ AI summary

Interstellar Marines is an abandoned early access game from 2013 that never fulfilled its promising premise of cooperative space marine combat against aliens and shark-like enemies. Players praise the concept and cool enemy designs but lament that development prioritized superficial features like weapon animations over core gameplay, ultimately resulting in a dead project with no updates in years. The consensus is strongly against purchasing, as the game remains incomplete and the developers have moved on.

Not recommended Aug 18, 2026
All-time classic abandonware. Truly ahead of its time
7 found this helpful
Not recommended Aug 17, 2026
Its from 2013 and still in early access. Pretty dead. The sharkhuman enemies looked very cool, unfortunately it never took off.
3 found this helpful
Not recommended Sep 30, 2026
Abandonware
Not recommended Sep 27, 2026
I back this when it was on Kickstarter. This one has so much promise... Space sharks next Gen combat ect ect. But they just kept adding dumb stuff. Weeks spend on weapon sway, months spent on different dumb animations that didn't really effect gameplay in a real way. All we wanted was coop space marine shock Troops fighting aliens and space sharks. Instead they decided to make a pretty C.O.D but with 100% lest intensive gameplay. And now the game is dead last update was almost 7 years ago. Do not buy
Not recommended Sep 15, 2026
dude no... 13 year old early access abandoned game and your actually charging for it? i remember when this game had potential.... nothings changed since then.
Recommended Aug 19, 2026
RIP was stoked about this one

Community reviews

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