Atic Atac

Atic Atac is an action-adventure video game developed and published by Ultimate Play the Game, released for the ZX Spectrum in 1983 and the BBC Micro in 1985. The game takes place within a castle in which the player must seek out the "Golden Key of ACG" by unlocking doors and avoiding enemies. It was Ultimate's second game to require 48K of RAM; most of their previous games for the Spectrum ran on unexpanded 16K models.

The game was written by Tim Stamper and its graphics were designed by brother Chris Stamper. Atic Atac received praise from critics upon release, mostly for its graphics and gameplay. It was later included in the 2015 release by Rare on the Xbox One retrospective compilation, Rare Replay. The game served as inspiration for the critically acclaimed adventure game show Knightmare.