Sven Co-op
Games like Sven Co-op

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actions with secrets you find without a guideor

Games like Sven Co-op

A free co-op Half-Life-based game where teams battle AI enemies and solve puzzles together, with casual online and LAN play.

Classic Marathon Infinity
A free-to-play sci-fi FPS with brutal combat, maze-like level design, and a cryptic, disjointed storyline, playable solo or in co-op/PvP across platforms.
2024-08-22
- Shooter

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Games like Sven Co-op | IndieDex

Sven Co-op
Games like Sven Co-op

Find the Steam hidden gems

actions with secrets you find without a guideor

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Games like Sven Co-op

A free co-op Half-Life-based game where teams battle AI enemies and solve puzzles together, with casual online and LAN play.

Classic Marathon Infinity
A free-to-play sci-fi FPS with brutal combat, maze-like level design, and a cryptic, disjointed storyline, playable solo or in co-op/PvP across platforms.
2024-08-22
- Shooter

Action

Warfare

First person

Science fiction

Classic Marathon 2

A free-to-play sci-fi FPS revived by fans for modern hardware, mixing single-player/co-op with cross-platform and LAN PvP, and delivering improved mazelike levels and new weapons in a roughly 9-11 hour package.

2024-07-12

Shooter
Action
Warfare
First person
Science fiction

Delivery & Beyond

A chaotic online co-op action-roguelike for up to five players (or 15) centered on breaking in, scrapping everything, and completing deliveries—short, party-style play that reviewers call fun with friends but sometimes tedious.

2026-01-27

Action
First person
Comedy
Science fiction
Adventure
Survival
Strategy
Indie
Business

Alien Swarm: Reactive Drop

A free co-op top-down shooter focused on squad tactics and alien-bug hunts, with online/LAN play and community content.

2017-04-20

Shooter
Action
Science fiction
Bird view / Isometric

Codename CURE

A free-to-play first-person co-op zombie shooter with class-based horde combat, objective and survival missions, and cross-platform play.

2017-10-31

Shooter
Action
Warfare

SCP: Containment Breach Multiplayer

A free-to-play multiplayer survival horror game where you and friends escape an SCP containment breach, blending tense horror with janky co-op comedy.

2021-10-25

First person
Horror
Indie

Black Mesa

A fan-made Half-Life remake with updated visuals, environmental puzzles, and a long single-player campaign, plus multiplayer modes.

2020-03-06

Shooter
Action
Warfare
First person
Science fiction
Platform
Adventure
Indie

CS2D

A free fast-paced top-down 2D multiplayer shooter with varied modes, a map editor, and short casual play sessions.

2017-11-15

Shooter
Action
Bird view / Isometric
Tactical

Alien Arena: Warriors Of Mars

A free-to-play arena FPS with CTF, tactical, and free-for-all modes, mutators, and cross-play, offering fast-paced PvP and co-op in short sessions.

2017-11-03

Action
Indie

X-MODE

A free-to-play indie FPS with casual online and LAN PvP, a variety of quick game modes, and Very Positive Steam reviews.

2025-09-19

Shooter
Action
First person
Indie

Hex Bots

A short free-to-play co-op action game of evading a rogue AI, collecting components and activating beacons to escape, with very positive player reviews.

2025-04-04

Action
First person
Science fiction
Horror
Survival
Strategy
Indie
Party

SCP: Labrat

A free-to-play horror escape through an SCP facility after a containment breach: play solo or co-op, scavenge resources and avoid anomalies, with short, scary sessions (reviewer median ~3 hours) that really shine in VR.

2022-12-24

Action
Adventure
Horror
Indie
Virtual Reality

Classic Marathon Infinity