Simplevaders is a Space-Invaders like 2D space shooter.
Intense 2D space shooter like Space-Invaders, but not quite. It uses OpenGL and includes particle effects.
The objective is to shoot the aliens before they reach the bottom of the screen.
Heres the help file:
simplevaders - a space-invaders like game that is nothing like space-invaders.
. simplevaders [--nosound] [--fullscreen] [--noblink] [--x pixels] [--y pixels] [--nostars] [--noparticles] [--sleep USeconds]
. s = toggle sound (if enabled)
. f = toggle fullscreen
. a = toggle starfield
. arrows = move ship
. lctrl = shoot
. btn0 = shoot
. xy aix.. go figure.