Interstellar Marines
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 InitiativeIt 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 MissionsPlay 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 ModesTake 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 SimulationWith 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
Game Discussion
Steam User 3
It was a game destined for greatness, sad to see it fizzle out
Steam User 9
I miss this game. One of my favorites for sure, 2025 could use a spacey tactical milsim. I loved it a lot
Steam User 3
The Tactical Shooter That Could Have Been
This game arrived on the scene with immense potential—a tactical shooter set in the eerie confines of an abandoned space station, teeming with deadly robots. Its premise alone was enough to intrigue and excite players. At its best, the game delivered genuinely terrifying moments. The atmosphere was impeccable, with hauntingly immersive level design and weapon sounds that hit just the right notes. The tension of sneaking through dark corridors, always anticipating the next killer droid encounter, was nothing short of electrifying.
However, the developers—a small, ambitious team—made a critical misstep. Instead of doubling down on the cooperative missions and expanding the arsenal, they shifted focus to player-versus-player (PVP) gameplay. And frankly, that decision derailed what could have been a phenomenal experience. The cooperative missions were the beating heart of the game, offering moments of strategic teamwork that felt incredibly rewarding. Had the team prioritized new missions, enemies, and weapons, this could have been a GTFO "Light"—a standout in its genre.
Sadly, the game was left to languish and was ultimately abandoned. It’s disheartening to think of what could have been if the spotlight had stayed on the cooperative elements. Released today, it might have found an audience among gamers who crave intense, atmospheric co-op experiences.
That said, I still have fond memories of playing solo, sneaking through levels and dismantling droids one by one. The stealthy thrill of it all provided hours of entertainment. But as it stands, this game is a relic of untapped promise. If it were made free-to-play, it could potentially reignite interest, allowing new players to explore its haunting world. But for now, it’s not worth spending your money on. Fun times—but ultimately, a cautionary tale in game development.
Steam User 4
I really hoped this game would be finished by now since it's been in early access
for nearly 5 years but then found out it had been abandoned 5 years ago.
I liked it a lot I haven't been able to play the Co-op or Multiplayer because
there's no servers available for it. I'm hoping the developers come back to it
And finish the game once and for all so we can finish the game.
Steam User 2
May not be a massively popular game but this is Highly one that should be, Very recommended
Steam User 10
Even in 2024, I highly recommend this game, especially given the price, 10$ USD. There's simply nothing like it. When I first played this I thought the concept would get stolen but no! I can't find anything that comes even close to what this game offers by means of atmospheric, engaging, well grounded, edge of your seat action. You would have to be really lucky to find randoms on any of the servers, but that's fine for anyone interested in just playing the game. It has several challenge scenarios to be played locally or online. Mostly Co-Op with some direct PvP as well as a very fun PvPvE mode called Wargames. Even though I haven't seen another player in wargames in over a year (concurrent to my playtime, people do pop in and out) I still have fun going in and extracting. The bots are very well balanced, and with a very nice range of difficulties, you're all but guaranteed to find the right pace for you or your group.
Steam User 2
I was going down my games list and saw this. This game was very immersive with the helmet/hud tech, weather, and technical design. I wish the devs nothing but love and appreciate the good times.
Leaving a positive review because I got my moneys worth back in the day.