There are a few parts in the game that show the Rockstar North picture (Rockstar North is the creator of the Grand Theft Auto games). In the mission "Home Coming," watch the scene where CJ picks Sweet up. You can see a small Rockstar North sticker on his suitcase. Also, look for a Grove St. gang member holding a beer bottle. Take a weapon with a scope (sniper rifle ect.) zoom in on his bottle and you can see a Rockstar North picture on it.