I'm sorry if this isn't the proper place for these, but I've bought a few of these bundles even though I only have Steam for Mac (sad, I know), so I have a few unused game codes. If anyone wants to try them and see if they're still good, they're all yours. Just re-post this with what you've used so people don't try ones that are already taken. Consider it my repayment to the board at large for the tips I've found throughout.
Tropico 4 Steam Special Edition | Steam Key: ZPE8D-05LKN-ZKBX2
Race Injection | Steam Key: IC8TY-YL48X-IDAP4
Warfare | Steam Key: LRK2A-LE832-FC9CE
Puzzle Kingdoms | Steam Key: 5HR37-I5TDN-H7IXQ
Gumboy Tournament | Steam Key: R9PD0-DEYYV-RF202
Supreme Ruler 2020 Gold | Steam Key: CNQWE-XKF47-TVX0A
Razor2: Hidden Skies | Steam Key: DG5AH-KR98F-KGTWI