Bastion

Bastion is a space shooter similar to the old vector based arcade game Star Castle. It is for 1 or 2 players (simultaneous co-op). Bastion is a futuristic, one- or two-player arcade-style shoot-'em-up in which your spaceship tries to blast its way through layers of rotating shields. It was developed by Steve Harter and published in COMPUTE!'s Gazette 1990/11.