Metroid Prime 1: I got past the Drowned Pirate Frigate without the Gravity Suit (Ugh..I hated that morph ball tunnel...) I got really mad when I made it to the Phazon Mines because I realized I didn't have the Plasma Beam. D:
Guitar Hero 3: I learned how to tap the intro to Through The Fire and Flames on Expert. (It makes a lot of people go crazy at parties O_o)
Metroid Prime 2: I tried to get an early Power Bomb expansion using Secret Worlds...but failed miserably. I was stuck in the secret world with no way to get to the Power Bomb. I also beat the Boost Guardian on hard mode (It took a long time..).