Qasir Al-Wasat: A Night in-Between tells the story of an invisible and frail creature which is summoned on 12th century Syria for a mission of infiltration and assassination, where it investigates and discovers the secrets of a wondrous palace and a trap that was set for it. The game employs simple mechanics and conceptual sounds and visuals. We are also on Steam Greenlight!
I could only play a half-hour because of insufficient alchemy instructions in-game, and no instructions on the games website