Doom
Galaga '88
Wolfenstein 3D
Mega Man X
Super Mario Bros. / Duck Hunt
Doom 2
Metal Slug
Super C
River Raid
Metal Slug 2
Contra III: The Alien Wars
Aliens
Toki
Contra
Zaxxon
Captain Skyhawk
Megamania
RoboCop
Missile Command
Demon Attack
Space Invaders
Tempest
Centipede
Earthworm Jim
Earthworm Jim 2
Defender
Galaxian
Here are all the genres detected on the database: