I have one Microvision game. Which is fine, since I don't have the handheld to play it on. I also have three Watara Supervision games, but no handheld. From everything I've heard, I'm not missing anything. Speaking of games without consoles, I also have a Neo•Geo CD game. I keep hoping I'll come across the system, but never do for a reasonable price.
I have one Fairchild Channel F game - Bowling. I have two Pioneer LaserActive games, Pyramid Patrol and Rocket Coaster. I have a single game for the ViewMaster Interactivision, a Sesame Street game. I have probably four or five Nintendo 64 games. I've got three, maybe four Tapwave Zodiac games (not a big deal, that's a large chunk of its limited library). I've got two Emerson Arcadia 2001 cartridges. I have two or three Nintendo DS games. I've got about three Tiger R-Zone games. Maybe I have more, I just don't recall since the system is so excruciatingly dull I've only played it for less than a minute in total. I do know I have the Panzer Dragoon game for it, though. I also have one game for the Sega SG-1000.