The new Uncharted 3 Drake's Deception Tournament System ushers in a points-based competition that has three reward tiers which grant you special in-game weapons or items based on how well you played. Once you unlock a weapon or item it's yours to use until the next tournament period.
You can buy into a tournament using tournament tickets. You'll always carry a balance of ten tickets per tournament period but you will be able to purchase more via the PS Store. A tournament leaderboard will be added to the leaderboards section so you can track your skill level among your friends