Graphic Adventure Creator (often shortened to GAC) is a game creation system/programming language for adventure games published by Incentive Software, originally written on the Amstrad CPC by Sean Ellis,[1] and then ported to other platforms by, amongst others, Brendan Kelly (Spectrum),[2] Dave Kirby (BBC, Electron)[3] and "The Kid" (Malcolm Hellon) (C64).

GAC was released in 1985 for the Amstrad CPC[1] and in 1986 for the ZX Spectrum,[5][2] Commodore 64[6][4] and BBC Micro.

[3] A simplified version without graphics, called just the Adventure Creator, was also released for the Acorn Electron in 1987.

[8][9] GAC had a more advanced parser than The Quill, allowing commands like GET THE LAMP THEN LIGHT IT, and a built-in graphics editor.

[11] Your Sinclair reviewed the ZX Spectrum version giving it a 9/10 score.