This is a little post for me to keep track of the games I've finished more than once. I'll edit/add to it as time goes on. For a game to appear on this list, I have to have finished the single-player mode at least twice.

Game Boys

• Pokemon Red 5x
• Pokemon Yellow 2x
• Pokemon Gold 2x
• Super Mario Bros. 3, 4x

Nintendo 64

• Goldeneye 64, 2x
• Banjo Kazooie 2x
• Mario 64, 2x

Playstation 2 (none yet)

Xbox 360

• Streets of Rage 2, 3x
• Gears of War 3x
• Earth Defence Force 2017, 3x
• Rainbox 6 Vegas 2x
• Gun 2x
• Guitar Hero 2 (career levels) 2x
• Halo 3, 4x
• Half-Life 2, 2x
• Mass Effect, 3x
• Condemned 2x

PC

• Starcraft 2x