Gothic 1 - I was in that wizard's tower where my next step was to go to the pinnacle of a mountain but the only way you could get out was to jump down and take some serious damage. Suddenly it hit me that I had the blood fly spell. So I cast, transformed into a blood fly, and flew all the way under a clear sky, full moon. The game developers caught the moon's lighting and washed out colors and contrasts perfectly. It was like you were really under a full moon sky with the landscape lit to perfection. It was a long trip and it was awesome. Thief: The Dark Project - My first serious PC game. Opening scene where I had to for the very first time blackjack a guard without getting caught. It is deeply etched on my mind.