Patch 1.13 introduces brand new multiplayer DLC and tournament play, amongst other things.
The biggest ever patch for Uncharted 3 has been released, and as you can imagine there's a lot of new stuff included.
The stand out additions are brand new multiplayer DLC. This DLC can be unlocked either by earning the necessary in-game levels, completing specific treasure sets, or if you want to unlock a certain item quickly you can purchase it in the PS Store, starting August 15.
Next up is a tournament system, which introduces a points-based competition that has three reward tiers that grant special in-game weapons or items.
And finally you'll find more info on the patch in general in this helpful video.