21 sci-fi shooter games on Steam with co-op or multiplayer, ranked by how many people are playing right now and how well they review. Part of Shooter.
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| Game | Modes | Type | Rating | Playing now | Price |
|---|---|---|---|---|---|
| STAR WARS™ Battlefront™ II | PvP, Single-player too | Sci-fi shooter | 88% | 9,213 | $39.99 |
| Halo: The Master Chief Collection | Co-op, PvP | Sci-fi shooter | 92% | 3,362 | $39.99 |
| Halo Infinite | PvP | Sci-fi shooter | 70% | 2,275 | Free |
| Half-Life 2 | Co-op, Local / split-screen | Sci-fi shooter | 98% | 1,555 | $9.99 |
| Black Mesa | Co-op, PvP | Sci-fi shooter | 95% | 907 | $19.99 |
| Half-Life | Co-op, PvP | Sci-fi shooter | 97% | 634 | $9.99 |
| STAR WARS™ Battlefront II (Classic, 2005) | PvP, Single-player too | Sci-fi shooter | 95% | 323 | $9.99 |
| Call of Duty®: Infinite Warfare | Co-op, PvP | Sci-fi shooter | 60% | 326 | $14.99 |
| Warhammer 40,000: Space Marine - Anniversary Edition | Online multiplayer, Single-player too | Sci-fi shooter | 92% | 95 | $39.99 |
| Half-Life 2: Deathmatch | Online multiplayer | Sci-fi shooter | 91% | 159 | |
| Half-Life: Opposing Force | Online multiplayer, Single-player too | Sci-fi shooter | 95% | 74 | $4.99 |
| DOOM 3 | Online multiplayer, Single-player too | Sci-fi shooter | 86% | 118 | $9.99 |
| Half-Life: Source | Local / split-screen, Single-player too | Sci-fi shooter | 69% | 27 | $9.99 |
| DOOM 3 | Online multiplayer, Single-player too | Sci-fi shooter | 89% | 49 | |
| Half-Life Deathmatch: Source | Online multiplayer | Sci-fi shooter | 75% | 43 | $9.99 |
| Binary Domain | Co-op, Single-player too | Sci-fi shooter | 86% | 8 | $14.99 |
| Quake 4 | Online multiplayer, Single-player too | Sci-fi shooter | 88% | 18 | $14.99 |
| Ricochet | PvP | Sci-fi shooter | 83% | 4 | $4.99 |
| DOOM 3 Resurrection of Evil | Online multiplayer, Single-player too | Sci-fi shooter | 84% | 14 | |
| Steel Storm: Burning Retribution | Co-op, Single-player too | Sci-fi shooter | 60% | — | $14.99 |
| Halo: Campaign Evolved | Co-op, Single-player too | Sci-fi shooter | — | — | $49.99 |
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.