All known retro games available here:
This torrent claims to have all known retro games (70GB):
All known NES ROMs
All known SNES ROMs
All known Nintendo 64 ROMs
All known Genesis / Mega Drive ROMs
All known Atari 2600 ROMs
All known Atari 5200 ROMs
All known Atari 7800 ROMs
All known GameBoy...