Is Interstellar Marines co-op?

Yes, Interstellar Marines supports co-op.

Does Interstellar Marines have PvP?

Steam does not list PvP for Interstellar Marines.

How many people play Interstellar Marines?

About 1 players were in-game when this page was built (2026-09-08).

Ready Up — what game do we play?Compare two Steam libraries →

Multiplayer games › Shooter › Tactical & milsim

Is Interstellar Marines multiplayer or co-op?

Yes — co-op. Interstellar Marines is a tactical & milsim game released in 2013, 54% positive on Steam (7,864 reviews), with 1 playing right now. $9.99 on Steam.

Co-opSingle-player tooShooter · Tactical & milsim

UPDATE 28 AVAILABLE - Interstellar Marines is an immersive tactical sci-fi First Person Simulator in the making, offering a unique blend of tactical gameplay,…

Steam tags: Action, FPS, Indie, Tactical, Co-op, Multiplayer, Sci-fi, Shooter

Do you and a friend both own Interstellar Marines?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Interstellar Marines is one of them — then helps you pick tonight's game with a weighted roll or a bracket.

Compare our libraries Steam store page

Games like Interstellar Marines you can play together

Tom Clancy's Rainbow Six Siege

Tactical & milsim · 84% positive on Steam (1,398,584 reviews) · 51,847 playing right now

Arma Reforger

Tactical & milsim · 76% positive on Steam (30,623 reviews) · 11,466 playing right now

Squad

Tactical & milsim · 83% positive on Steam (210,551 reviews) · 9,116 playing right now

Arma 3

Tactical & milsim · 90% positive on Steam (283,264 reviews) · 7,181 playing right now

Ready or Not

Tactical & milsim · 89% positive on Steam (236,196 reviews) · 4,296 playing right now

Hell Let Loose

Tactical & milsim · 82% positive on Steam (137,677 reviews) · 3,380 playing right now

Tired of Interstellar Marines? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is Interstellar Marines co-op?: Yes, Interstellar Marines supports co-op.
Does Interstellar Marines have PvP?: Steam does not list PvP for Interstellar Marines.
How many people play Interstellar Marines?: About 1 players were in-game when this page was built (2026-09-08).

Ready Up is a free tool: enter two Steam usernames and it lists the multiplayer games you both own, runs a bracket to pick one, and suggests new co-op games that fit how you both play. Ratings, tags and player counts from Steam and SteamSpy; updated 2026-09-08. Powered by Steam — not affiliated with or endorsed by Valve Corporation.