Crystal Castles is an arcade-style maze game originally released for the Atari 2600 in 1983. It belongs to the action-adventure genre with elements of a platformer. Players maneuver a bear named Bentley Bear through isometric 3D-rendered castles filled with gemstones, enemies like ghosts and witch-like characters, and various obstacles. The objective is to collect all gems across various levels while avoiding enemies and navigating the mazelike pathways. Each castle features a unique layout and players must dodge enemies or use items like honey pots to temporarily immobilize them, enhancing the game's strategy and challenge.