1. Lista giochi co-op su Steam
  2. A Valley Without Wind (Metroidvania a generazione casuale dei mondi, fino a 16 player)
  3. Alien Breed series (2 Players)
  4. Alien Swarm (4 players)
  5. Alien vs Predator (4 players)
  6. Alien vs Predator Classic 2000 (4 players)
  7. Arma II (4 Players)
  8. Beat Hazard (2 players)
  9. Binary Domain (4 players)
  10. Blacklight: Tango Down (4 players)
  11. Borderlands (4 Players, Shit tons of content)
  12. Bulletstorm (4 Players)
  13. Bunch of Heroes (4 Players)
  14. Call of duty: Black Ops (6 Players)
  15. Call of duty: Modern Warfare 2 (4 Players)
  16. Call of duty: Modern Warfare 3 (2 Players)
  17. Call of duty: World at War (4 Players)
  18. Conflict: Denied Ops (2 Players)
  19. Dead Island (4 Players)
  20. Dead Rising 2 and Off the Record (2 Players)
  21. Dungeon Siege 3 (2 Players, è anche bello se non fate caso al nome. Somiglia più a Dark Alliance/Champions of Norrath sulla PS2)
  22. Dungeon Defenders (4 Players in Co-Op, 8 Players in Monsterfest, anche di più Deathmatch and CTF. DLC ovunque)
  23. Earth Defense Force: Insect Armageddon (6 Players)
  24. Evochron Mercenary (35 Players nello spazio profondo)
  25. F.E.A.R. 3 (4 Players)
  26. Gatling Gears (2 Players)
  27. Grand Theft Auto IV (4 Players, DRM: The Game)
  28. Killing Floor (6 Players)
  29. Lara Croft and the Guardian of Light (2 Players)
  30. Left 4 Dead (4 Players)
  31. Left 4 Dead 2 (4 Players)
  32. Lord of the Rings: War in the North (3 Players)
  33. Madballs in...Babo: Invasion (4 Players)
  34. Magic the Gathering: Duels of the Planeswalkers 2012 (2 Players)
  35. Magic the Gathering: Duels of the Planeswalkers 2013 (2 Players)
  36. Magicka (4 Players, DLC ovunque)
  37. Nation Red (4 Players)
  38. Orcs Must Die! 2 (2 Players)
  39. Overlord (2 Players)
  40. Overlord II (2 Players)
  41. PAYDAY: The Heist (4 Players)
  42. Portal 2 (2 Players)
  43. Quake (16 Players uniti per la campagna single player)
  44. RAGE (2 Players)
  45. Red Faction: Armageddon (2 Players)
  46. Resident Evil 5 (2 Players)
  47. Saints Row 2 (2 Players, da problemi con i PC nuovi)
  48. Saints Row: The Third (2 Players)
  49. Serious Sam 3: BFE (16 Players)
  50. Serious Sam HD: The First Encounter (16 Players)
  51. Serious Sam HD: The Second Encounter (16 Players)
  52. Shank 2 (2 Players)
  53. Shoot Many Robots (4 Players, è Metal Slug con i loot)
  54. Sonic the Hedgehog 4: Episode II (2 Players)
  55. Steel Storm: Burning Retribution (8 Players)
  56. Team Fortress 2 (32 Players)
  57. Terraria (8 Players)
  58. Titan Quest+Espansione (6 Players)
  59. Torchlight 2 (8 Players, Esce quest'estate :3 facciamo la colletta sul 4-Pack)
  60. Transformers: War for Cybertron (3 Players)
  61. Trine 2 (3 Players)
  62. Warhammer 40K: Space Marine (4 Players)