I was playing a modded STALKER: Clear Sky game, running around doing assassination missions. As I neared my target, it was dusk, he was sitting by a campfire by himself, strumming a guitar. I just ended up sitting beside him and listening to him strum awaya sad sounding song, feeling bad for him, thinking about how harsh the Zone really was and felt bad so I let him live and canceled the quest. It was the only real time I ever hesitated to do something in a game. It was great.