[Norm Lenhart]

I loved the vector games. There was one I only got to play once called , I think, Crystal Castles. It was Crystal something or other. It had a series of counter-rotating vector lines forming circles within each other and you had to shoot through them to get to the center.

Nothing by modern standards but incredible then.

[Dr. Sivana]

You are thinking of Cinematronics' "Star Castle". "Crystal Castles" was a 3/4 perspective raster game by Atari featuring a bear.

Star Castle WAS a conceptually well designed game. It had faux color (colored cellophane over a monochrome screen), and some nice special effects when you nailed the enemy behind his rotating shields. Simple to understand, maddening hard in later rounds, but never impossible.

Space Wars was a VERY early Cinematronics arcade game, WAY ahead of its time. Of course Atari had Asteroids.

Modern computers have more than enough resolution to perform effective vector emulation, and the exceptional Vectrex home games (all non Atari BW vector games like Tank Battle and Star Castle) have been placed in the Public Domain, and can be used with the Mame emulator.