In Space Invaders 91, you control a spaceship that has to destroy rows of alien invaders from reaching you at the bottom of the screen. (segadoes.com)
The Duke Nukem video games first launched back in July 1991 from Apogee Software Ltd. and centered on Duke, the titular character, a muscular, cigar - chomping figure, as he set out to protecting humanity from alien invaders in his own signature style. (cbr.com)
Players are tasked with defending the Earth against alien invaders by commanding grounded mechs or airborne spaceships, but suddenly things become a bit more realistic than any gamer could have ever predicted. (jamiex66.com)