Update:

Game released the video footage of him punching 40 Glocc after the initial confrontation.

After leaving a mansion party in Los Angeles, G-Unit affiliate 40 Glocc got attacked by Game and a crew of 12 people.  40 Glocc was alone at the time of the confrontation.

Both rappers took to twitter after the altercation. Apparently, Game's crew took video footage of the altercation, which Game threatened to post.  40 Glocc posted a photo of himself smiling after the fight, showing damage to his eye and nose.

40 Glocc has a long history of beef with Game and his Black Wallstreet crew.  In May of 2011, 40 Glocc was involved in a massive club brawl with Black Wallstreet member Menace.