Qasit al-Wasat is a 2D overhead stealth action game set in a palace out of the Arabian Nights. You play as an invisible demon, summoned by a sorcerer to slay three people in the palace, with the magical and poisoned weapons they carry as your reward.
Since you are invisible, you are represented as a sort of distortion at screen center; so long as you remain in stealth mode and avoid getting too close to the humans of the palace, you are safe... and can kill them instantly by sneaking up and attacking. However, blood often spatters on you, making you visible to the guards; and at times, there are traps that spray powder on you, with similar results. And you are quite vulnerable; a single sword-slash from a guard kills you. However, you can find water and cleanse yourself, if you are quick about it.