This is a video of how to defeat the T-Rex in the Tomb Raider Anniversay.

Climb, swim, and backflip your way through a maze of cryptic deathtraps so realistic you can practically smell the decaying flesh. Unload an arsenal of lethal firepower on any wild-dog, giant lizard or blood-thirsty mercenary that gets in your way. Your mission is the deadliest one to date -- the recovery of the fabled Scion, an incredible treasure reputed to give its possessor vast power. Get ready to cross the globe to take on impossible odds while exploring Incan ruins, Ancient Rome, Egyptian Pyramids, and the Lost City of Atlantis...