In Sin Mark you are Akahn, fighting to cleanse evil from your land by finding and destroying the dark gates through which the demons are emerging. An action adventure/RPG game where you progress through the levels by defeating all the demons and destroying their gates. Runes are found along the way which can be crafted into powerful spells enhancing your offensive capabilities. Trinkets drop from some enemies and these again serve to increase your powers. The game is played via keyboard and mouse, A&D for movement, with mouse aiming and clicking to fire arrows and launch spells.