Crystal Quest is an action game written by Patrick Buckland for the Macintosh and published by Casady & Greene in 1987.

[1] Game Mechanics LLC licensed Crystal Quest and launched a Kickstarter to raise money to create a new version in February 2015.

Crystal Quest is easier to play in color mode on the Macintosh version as opposed to monochrome, as more RAM is used, causing enemies to move slower.

[2] Macworld reviewed the Macintosh version of Crystal Quest, praising its action gameplay and colorful graphics, stating that Crystal Quest is "Fast, challenging action ... You learn to play in minutes because the game is so intuitive ...

Crystal Quest is especially fun to play on a color Mac II because the vivid color-cycle graphics rival those of the finest arcade games.