PS3: Enchanted Arms
It's actually quite addicting after you get past the first few hours...
Wii: Super Mario Galaxy
Just got it an hour ago, only 2 stars so far...
PSP: Jeanne d'Arc
But only when I actually touch my PSP, which is only once every few weeks...
DS: Kanji Sono Mama
That's a bit of a joke actually, as that's just an electronic dictinary application and not a game
PC: Supreme Commander - Forged Alliance
Expansion pack! Now even slower! 