Crystal Castles on the Commodore 64 is an isometric maze game based on Atari’s arcade original, where you guide Bentley Bear around 3D-style castles collecting all the gems while avoiding enemies like trees, skeletons, gem-eaters, and Berthilda the witch. Grabbing the magic hat lets Bentley become temporarily invincible and even knock out Berthilda, and some foes will gobble up the gems themselves, pushing you to race them to the last crystal for bonus points. The C64 has (unusually) two different versions—an official Atarisoft/US Gold release and an unofficial but more arcade-like Thundervision build—both offering fast, twitchy movement across multi-level, wraparound castles that feel like a 3D twist on Pac-Man.