- O.d.t. cheat 2006-11-30
- Obscure 2009-07-06
- Oddworld: Abe’s Exoddus 2010-06-24
- Oddworld: Abe’s Exoddus 2010-08-21
- Oddworld: Abe’s Exoddus cheat 2006-11-30
- Oddworld: Abe’s Oddysee cheat 2006-11-30
- Oddworld: Stranger’s Wrath 2009-07-16
- Odyssey cheat 2006-11-30
- Offensive cheat 2006-11-30
- Oh, No! More Lemmings cheat 2006-11-30
- Oldtimer cheat 2006-11-30
- One Must Fall 2097 cheat 2006-11-30
- One Step Beyond cheat 2006-11-30
- One Unit Whole Blood 2009-10-12
- Oni cheat 2006-11-30
- Open Season 2008-12-11
- Open Season 2009-04-16
- Open Season Minigames 2008-09-19
- Operation Blockade cheat 2006-11-30
- Operation Desert Hammer cheat 2006-11-30
- Operation Flashpoint – Dragon Rising 2010-12-13
- Operation Flashpoint cheat 2006-11-30
- Operation Flashpoint: Red Hammer cheat 2006-11-30
- Operation Meteroid cheat 2006-11-30
- Operation Rail 2010-02-15
- Operation Spacehog cheat 2006-11-30
- Opplosing Eggerland 3 cheat 2006-11-30
- Oregon Trail 3 cheat 2006-11-30
- Oscar cheat 2006-11-30
- Osiris cheat 2006-11-30
