Similarity

Games like Alien Swarm

Free to Play, Co-op, Online Co-Op, Aliens, Shooter, Top-Down, Top-Down Shooter, Survival

Dota 2

Action, Strategy, Free To Play

80% positive · 2.8M reviews · 320k peak

Spiral Knights

Action, Adventure, Casual, Indie

84% positive · 24k reviews · 130 peak

SCP: Secret Laboratory

Action, Casual, Indie, RPG

91% positive · 236k reviews · 3.6k peak

Team Fortress 2

Action, Free To Play

91% positive · 1.3M reviews · 45k peak

Zombie Panic! Source

Action, Adventure, Casual, Indie

85% positive · 7.9k reviews · 14 peak