There are probably some I've forgotten, but games that stand out to me that I've completed are: Toy Bot Diaries 1 and 2, Bounce On 1, Above and Beyond: Air Combat, Stoneloops, Luxor, Blades of Fury, Bridge Odyssey, Cocoto Kart Online, Crash Kart 1, Plants Vs. Zombies, Powerboat Challenge, Rolando 1 and 2, Sally's Spa, SMB1, Sway, Touchgrind, Touch Physics, Castle of Magic, Krazy Kart (unlocked everything), Defender Chronicles, iBlast Moki, and Super QuickHook (beta). I've completed plenty of games, but it's a pretty small number considering I keep over 200 games on my iPod.