The supposed game sees two people taking turns to punch one another.
The game ends when one of the contestants gives in.
Tragically, Tommy Main, 23 – who had a four year old daughter – is claimed to have collapsed shortly after he was hit during ‘Punch 4 Punch’ at a party.
Tommy, from South East London, was taken to hospital in a critical condition but later died.
Earlier, his brother, Roy, went online to express his grief at the loss of his brother
He wrote: “I had to say good by to my little brother today for the last time.
“I’m hurting so bad I don’t think I’ll ever be the same again.
“For the people at the party who call yourselves friends, you should have stopped it, not try and film it. I hope you can’t sleep.”
A fellow partygoer was arrested and has been released on bail.
Police are now waiting for a post mortem examination to establish the exact cause of his death.