Crystle Castles is a clone of the arcade game Crystal Castles. In this game, you have multi-level platforms on the screen, with dots that you have to collect, while dodging monsters. It is done on a diagonal 3D screen layout (similiar to Zaxxon, with a variety of monsters chasing you. There are tunnels you can go through (although, it can get confusing doing so since your character doesn't actually disappear when going into one), and elevator pads that peroidically go up and down as well. You can also jump over monsters, and some you are supposed to ram into. It bears some resemblance to Tandy's Springster, although noweheres near as complicated.
Title: Crystle Castles
Author: ??? (JON is built into the high score list... initials or 1st name of the author?)
Publisher: Thundervision
Released: 1984
Requires: Color Computer 1,2,3, 32K RAM, tape or disk, joystick.