That Which Sleeps is a turn-based strategy game where the player assumes the role of an ancient being who was sealed away in ages past but has now returned to reclaim dominion over the world. However, when you waken you are weak and must lurk in the shadows to avoid a return to your demonic slumber.
This is where That Which Sleeps deviates from the typical turn based strategy formula. Rather than directly affecting the world by building or training troops, you use your power to indirectly influence the world utilizing uniquely designed Agents who can infiltrate the nations of the world, terrorize outlying farms, and perform esoteric rituals to create the perfect situation for your return.
The player must balance an aggressive approach utilizing his considerable power and eager hordes with the need to remain unknown to the Champions and Heroes of the world. This allows for multiple play styles and various meaningful decision paths - all made more unique and re-playable due to the large cast of available agents and awakened demons aka "Ancient Evils". In addition, the world is customized at the beginning of the game as you explicitly lay out how you were sealed away, and what methods you used to manipulate the world in your slumber.
