| | Giant Gems (Vivid) (MPU5) (set 2) (clone of: m5ggems) | 1969 | Vivid | m5ggems20 | | 0.00 |
| | Giant Gram 2000 (JPN, USA, EXP, KOR, AUS) | 2000 | Sega | gram2000 | | 0.00 |
| | Giant Gram: All Japan Pro Wrestling 2 (JPN, USA, EXP, KOR, AUS) | 1999 | Sega | ggram2 | | 0.00 |
 | Giga Man 2: The Power Fighters (bootleg of Mega Man 2: The Power Fighters) (clone of: megaman2) | 1996 | bootleg | gigaman2 | | 0.00 |
 | Giga Wing (Asia 990222) (clone of: gigawing) | 1999 | Takumi (Capcom license) | gigawinga | | 0.00 |
| Giga Wing (Brazil 990222) (clone of: gigawing) | 1999 | Takumi (Capcom license) | gigawingb | | 0.00 |
| Giga Wing (Hispanic 990222) (clone of: gigawing) | 1999 | Takumi (Capcom license) | gigawingh | | 0.00 |
| Giga Wing (Japan 990223 Phoenix Edition) (bootleg) (clone of: gigawing) | 1999 | bootleg | gigawingjd | | 0.00 |
| Giga Wing (Japan 990223) (clone of: gigawing) | 1999 | Takumi (Capcom license) | gigawingj | | 0.00 |
| Giga Wing (USA 990222 Phoenix Edition) (bootleg) (clone of: gigawing) | 1999 | bootleg | gigawingd | | 0.00 |
| Giga Wing (USA 990222) | 1999 | Takumi (Capcom license) | gigawing | Shooter / Flying Vertical | 9.07 |
| | Giga Wing 2 (JPN, USA, EXP, KOR, AUS) | 2000 | Takumi / Capcom | gwing2 | | 8.12 |
 | Gigandes | 1989 | East Technology | gigandes | Shooter / Flying Horizontal | 0.00 |
| Gigandes (earlier) (clone of: gigandes) | 1989 | East Technology | gigandesa | | 0.00 |
 | Gigas (bootleg) (clone of: gigas) | 1986 | bootleg | gigasb | Breakout | 0.00 |
| | Gigas (MC-8123, 317-5002) | 1986 | Sega | gigas | | 0.00 |
 | Gigas Mark II (bootleg) | 1986 | bootleg | gigasm2b | Breakout | 0.00 |
| | Gilligan's Island (L-3) (clone of: gi_l9) | 1991 | Bally | gi_l3 | | 0.00 |
| | Gilligan's Island (L-4) (clone of: gi_l9) | 1991 | Bally | gi_l4 | | 0.00 |
| | Gilligan's Island (L-6) (clone of: gi_l9) | 1991 | Bally | gi_l6 | | 0.00 |
