The victim was targeted after he left an Asda store just an hour and 20 minutes after the game went on sale. He was hit with a brick, stabbed and stripped of his mobile phone, watch and his copy of Grand Theft Auto V during the attack on Princes Avenue in Colindale.
Police are questioning three youths - aged 15, 17 and 18 - on suspicion of robbery at a police station in north London.
Three teenagers have been arrested after a man was stabbed and robbed of a copy of Grand Theft Auto V less than two hours after buying the game in Colindale.
The 23-year-old was attacked as he made his way home from a midnight launch event in the early hours of yesterday morning.