#shoot-em-up games (6)
Atari 2600
 

Centipede

Atari 2600
 

Defender

Atari 2600
 

Demon Attack

Atari 2600
 

Galaxian

Atari 2600
 

Missile Command

Atari 2600
 

River Raid

Here are all the genres detected on the database: