From Wikipedia Crystal Castles is an arcade game released by Atari, Inc in 1983. The player controls a cartoon bear by the name of Bentley Bear, who has to collect gems located throughout trimetric-projected rendered castles while avoiding enemies out to get him as well as the gems. Crystal Castles is also notable for being one of the first arcade games with an actual ending, whereas most games of the time either continued indefinitely, ended in what was termed a "kill screen" (a level which was impossible to complete and resulted in the player losing all his 'lives') or simply just restarted from the first level.