(in no particular order)
Dreamcast
Game Boy Advance
GameCube
Genesis
NES
N64
PlayStation
PlayStation 2
Super NES
Xbox
(in no particular order)
Dreamcast
Game Boy Advance
GameCube
Genesis
NES
N64
PlayStation
PlayStation 2
Super NES
Xbox
Currently catching up on PSN, WiiWare, Wii U E-Shop and Xbox Live Arcade exclusives I missed.