Hmm...

- PC
- Atari 2600 (portable version)
- Atari 2600 (big, fake-wood version
- Atari 520 Ste
- NES
- Game Boy (yellow colour)
- Game Boy Color
- Game Boy Advance (old version)
- Game Boy Advance (new version)
- Game Gear
- Master System (version II)
- Megadrive/Genesis
- Dreamcast
- SNES
- Nintendo 64
- Gamecube
- Playstation (grey version)
- PSOne (portable, white version)
- Playstation 2
- X-Box

I've collected them over the years, but I hardly ever play games these days.