A single screen and lots of enemies to shoot defines this genre.
Abductor
Commodore VIC-20 1983@4073
Arcadians
BBC Micro 1984@516
Astro Fighter
Arcade 1979@2314
Attack Force
Arcade 1979@3689
Battlantis
Arcade 1987@1537
Boot Hill
Arcade 1977@1391
Carnival
Arcade 1980@2750
Centipede
Arcade 1981@568
Centipede: Recharged
PlayStation 5 2021@3082
Deluxe Galaga
Amiga 1995@1516
Demon Attack
Atari 2600 1982@983
Exerion
Arcade 1983@3450
Galaga
Arcade 1981@184
PlayStation 4 2016@1634
Galaga '88
PC Engine 1989@2872
Galaga Legions DX
Xbox 360 2011@297
Galaga: Demons of Death
NES 1988@1452
Galaxian
Arcade, October 1979@185
NES 1984@3507
Gaplus
Arcade 1984@1527
Gorf
Arcade 1981@3690
Gridrunner
Commodore VIC-20 1982@2324
Gun Fight
Arcade 1975@1390
Millipede
Arcade 1982@1568
Moon Cresta
Arcade 1980@1610
Ozma Wars
Arcade, December 1979@2147
Pang
Amiga 1990@513
Phoenix
Arcade 1980@1504
Pisces
Arcade 1982@3695
Pleiads
Arcade 1982@3696
Radar Scope
Arcade, December 1979@2137
Return of the Invaders
Arcade 1985@1005
Satan's Hollow
Arcade 1982@3692
Sega-Galaga
Sega SG-1000 1984@3715
Space Beam
Arcade 1979@2152
Space Invaders
Arcade, July 1978@968
Atari 2600 1980@982
Sega SG-1000 1985@3725
Game Boy 1990@3700
PlayStation 1999@3168
Space Invaders '91
SEGA Genesis 1990@3699
Space Invaders Extreme
PSP 2008@35
Space Invaders: Fukkatsu no Hi
PC Engine 1990@2873
Stratovox
Arcade 1980@1210
Titan Attacks!
PlayStation 4 2014@1261
UniWar S
Arcade 1980@3697
Verminest
Windows 2012@1897
