Arx Fatalis

Arx Fatalis is played from a first-person perspective and is set on a world whose sun has failed, forcing the above-ground creatures to take refuge in subterranean caverns. One game mechanic is the use of mouse gestures to cast spells. The design of Arx Fatalis was influenced by games from the now-defunct Looking Glass Studios, especially Ultima Underworld. Arkane Studios have stated that Arx Fatalis was intended to be Ultima Underworld III. (wikipedia.org)