Shout Out / Uncharted 2: Among Thieves

• Harry Flynn's T-shirt in his introductory cutscene also says NDI.
• At the end of the Borneo level, when Sully and Nate have to jump off a cliff to escape, Sully tells him: "After you, Butch." They both jump off the cliff into the water below, mirroring a famous scene from that movie. Nate even says, "Oh shiiiiiit!"
• I HATE spikes! During a descending ceiling, no less!
• The chapter in which Nate and Tenzin find Schaeffer's expedition is called "Heart of Ice". Given that the expedition ended with the men going mad with power and having to be executed by Schaeffer, it's pretty clear that this is a reference to Joseph Conrad's Heart of Darkness.
• The sap from the Tree Of Life is a blue, glowing, and volatile Psycho Serum that grants increased strength in exchange for Sanity Slippage, making it a dead ringer for Phazon, most noticeably in its partially congealed form found throughout Shambhala.
• The multiplayer mode includes characters from InFamous, Killzone and Resistance. The Helghast soldier also returns for the third game.
• Navarro's mercenaries return as playable skins, with most of them ('Dutch', 'Dillon', 'Blaine', and 'Mac') being named after characters from Predator.