Tomb Raider has had a bit of multiplayer-gameplay released yesterday in the The Final Hours #4 . This Tomb Raider is a complete reboot of the series with a completely remade Lara Croft. You play as a younger Lara who crashes on a isolated tropical island after her ship gets hit by a deadly storm and splits into two. While on this island, Lara comes across a dark threat that makes the island more dangerous.. Lara must face this threat and get off the island to safety. Tomb Raider is set to release for the PS3 on March 5, 2013.
Surviving Together goes into the development of the mutliplayer aspect of Tomb Raider and, essentially, how it all came about. It is an interesting look at how the team were hoping that at some point multiplayer would be incorporated but were a bit finicky about it until the time came and resources allowed them to do it. Yes, it features the first gameplay of Tomb Raider multiplayer.
Here shall be the gameplay/documentary.
Source: Tomb Raida