I'm sorta cheating, because most of this stuff I got in November, but I wanted it to be altogether so oh well.

GTA V, Borderlands, and Metroid Prime 3: $60 total at Gamestop.
Red Dead Redemption: Free from a friend.
Xenoblade Chronicles: $35 at Gamestop on Black Friday
Payday 2: $20 also at GameStop on Black Friday
Luigi's Mansion: $15 from a collector on Facebook swap site.
Power Stone 2, Marvel vs. Capcom 2, and Cannon Spike: $40 from Craigslist
Paper Mario Sticker Star: $8 on sale at Best Buy
Link Between Worlds: $40 at GameStop
Tetris: $5 from Larry (Thanks again)
Not the best, but still pretty good considering I'm a high school student with no job haha.