Sega Game Gear Collection

All Japanese loose cartridges unless noted otherwise. List still a work in progress!

Aladdin

Castle of Illusion Starring Mickey Mouse

Dynamite Headdy

Gear Stadium Heiseiban

G-Loc Air Battle

Halley Wars

J. League GG Pro Striker

Joe Montana Football

Kick & Rush

Kinetic Connection

Land of Illusion Starring Mickey Mouse

Last Bible

Moldorian

Mortal Kombat II

Nazo Puyo 2

NBA Jam Tournament Edition

Outrun

The Pro Yakyuu '91

Putt & Putter

Puyo Puyo

Riddick Bowe Boxing

Shikinjo?

Sonic Drift 2

Sonic the Hedgehog

Sonic the Hedgehog 2: Sonic & Tails

Super Golf

Super Monaco GP

Tempo Jr.

Ultimate Soccer

Wonder Boy

Woody Pop

Zan Gear

Consoles: 

Red Coca-Cola edition

Red

Standard black (CIB, currently not working)
Yellow