If you could only buy/receive one game for the rest of the year..

[mtofu]

All around I'd probably get Tetris or a good Chess game.

For any system I'd get Rock Band 2 (But I'll be getting this for the PS3).

If someone gifted me Rock Band 2 and I could make a different choice for any of the systems
- for PS3 I'd get Valkyria Chronicles
- for Wii I'd get... nothing. Maybe King of Fighters Collection if I really had to.
- for XB360 I'd get Call of Duty for online play.