Uncharted 2 multiplayer, beta confirmed - GameSpot

Naughty Dog's story-driven action adventure picks up co-op, competitive modes for fall launch on PS3; beta key packed in with Infamous purchase.
Nathan Drake returns for some more tomb raiding in the sequel to Naughty Dog and Sony's 2007 archaeological action adventure hit.

Uncharted 4 Multiplayer Beta Now Open

Uncharted 2 Multiplayer Beta Hands-On - GameSpot

Uncharted 4 Launching Second Beta - GS News Update

Uncharted 2: Among Thieves - Wikipedia

Uncharted: Drake's Fortune - Wikipedia

Uncharted 2: Among Thieves (Game) - Giant Bomb

Uncharted 2: Among Thieves (Game) - Giant Bomb

What the Uncharted 4 Multiplayer Beta Taught Naughty Dog

Uncharted 2 multiplayer, beta confirmed - GameSpot

Uncharted 2 dev talks Twitter - GameSpot

Uncharted 2, Uncharted 3, and The Last Of Us Multiplayer Servers Going Offline Forever - GameSpot

Uncharted 2: Among Thieves - GameSpot