The goal of the game is to destroy the secret cult of Akbaa: the god of devastation and chaos, and thereby prevent his return to the physical world. Should the player fail, the demon is bound to impose his reign of terror upon Arx. The player, assuming the role of the potential hero, fights inside an underground fortress using wooden clubs, swords and magical items to defend himself against creatures including goblins, trolls, ratmen and other vicious opponents. But, brute force is not always the best way to succeed and the player has at his disposal the innovative new "onscreen gesture based magic system" to assist him in his progress through the game. Using the mouse, burning runes can be drawn in mid-air. A series of these gestures combine to create powerful magic spells that will protect the player or empower him to defeat his enemies and pursue his quest.