You know, this isn't the first time a game has tied itself in a knot to make the player feel bad about something they did in a previous game.
One mission in GTA IV has Niko chasing down and killing a couple of bikers on the orders of a mobster. Then the DLC expansion
The Lost and Damned comes along and reveals that one of the bikers you killed was Jim Fitzgerald, one of Johnny's good friends and a major character in the DLC. As TV Tropes put it "To Johnny, Jim was the closest of friends. To Niko Bellic, Jim was just a nameless kill among many nameless kills." There's just one tiny problem.
This is Jim.
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These are the guys you kill in that mission. The guy on the left is supposed to be Jim.
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Yeah, totally the same person.