Yeah, I know it's nothing compared to some of you guys, but here is a complete list of systems I own. I estimate that I have around 1,000 games to go with the systems, and 500 magazines and numerous catalogs/misc. stuff. All are 100% complete in box unless otherwise stated.

Atari 2600 (no box or instructions)
Atari 5200
Atari 7800
Atari XE Game System
Atari Lynx
Atari Jaguar
Coleco Telstar Marksman (missing rifle butt)
Fairchild Channel F
RCA Studio II
Bally Professional Arcade
Odyssey 2
Milton Bradley Microvision (two, but one doesn't work)
Intellivision II (no box or instructions)
Colecovision
Vectrex (no box or instructions)
Action Max (no box or instructions)
Nintendo Entertainment System (NES)
Super Nintendo
Nintendo 64
Nintendo Gamecube
Nintendo Gameboy
Nintendo Gameboy Color (no box or instructions)
Nintendo Gameboy Advance SP (no box or instructions)
Nintendo Virtual Boy
Sega Master System
Sega Genesis
Sega Saturn (no box or instructions)
Sega Dreamcast
NEC Turbo Grafx 16 and CD-ROM
NEC Super Grafx
SNK Neo-Geo
Panasonic 3DO FZ-1 (two, but one has no box or instructions)