Naughty Dog has been great about supporting Uncharted 3 multiplayer content well after its release and continue that support with a brand new bonus for playing this weekend. Along with a double cash for all of the multiplayer, there will a greater chance of you receiving rare treasures in all co-op modes. This includes Hunter, Arena, and Adventure as well as playing on a higher difficulty setting will increase your chances even more.
The event started December 14 and will last until Tuesday December 18, 2012 at 12:00 GMT. Naughty dog plans to even more special weekends in the coming weeks. Be sure to stay up to date on all of these events by checking the calender on your Uncharted 3 stats page.
This lines up perfectly with today's Gaming Union Clan Night as we will be playing Uncharted 3 Multiplayer. The event is usually held on around 10:00PM (UK time)/5:00PM (EST). For more info click here and be sure to join fellow members if you can make it.
Source: Naughty Dog