Naughty Dog's second game of this console generation, UNCHARTED 2: AMONG THIEVES, received critical acclaim for perfectly blending story telling, high-quality animation and of course gameplay. The game's AI not only allowed the creation of believable buddies that accompany the player (as Nathan Drake) throughout the game, but also supported the variety of enemies in both single player and co-operative modes.

In this 1h30 interview with Christian Gyrling, you'll hear how the new features were implemented, from the implementation of movement via traversal packs, to support for stealth gameplay. You'll also find out all the little details that went into creating the AI for these characters, including the character layering, the integrated pathfinding and obstacle avoidance on the PS3's SPUs, the navigation meshes, the blend tree's functioning, the flat & dynamic structure of the behavior tree, and more...