Tomb Raider: Anniversary Unlockables and YouTube Video Walkthrough (PC)

Tomb Raider: Anniversary, previously known as Tomb Raider: 10th Anniversary Edition, is the latest release of the Tomb Raider series. It is a remake of the original Tomb Raider game from 1996, using an improved version of the Legend game engine. It includes all the original 'worlds' from Tomb Raider. The game was developed by Crystal Dynamics for Sony's PlayStation Portable, PlayStation 2, Windows and Nintendo's Wii. The Lara model has been upgraded with over 7,000 polygons and has inherited a few new moves, a pole-hopping move where Lara can balance on narrow surfaces. She can also "perch" or balance on small platforms and not lose her balance.

Also Lara can run across walls while swinging from her hook grapple. Finding secrets, called "Relics", plays an important part in the game, like in the original Tomb Raider. The "Relics" are used to unlock new costumes, and the "Artifacts" unlock the other bonus features (like commentaries, music, comparison shots etc.). Here's a list of unlockable cheats and specials for those fans that want to get the max out of this great gaming experience:

Unlockables

Unlockable Cheats
All Weapons - Complete all Greece Time Trials

Infinite 50 Caliber pistol ammo - Complete all Peru Time Trials

Infinite Breath - Complete the game on any difficulty

Infinite Shotgun ammo - Complete all Greece Time Trials

Show Enemy Health - Complete all Peru Time Trials

Show Enemy Health - Complete time trials on the four Peru levels (Mountain Caves, City of Vilcambaba, The Lost Valley, Tomb of Qualopec).

Sunglasses - Complete the game on any difficulty

Textureless Mode - Complete the game on any difficulty

Unlockable Special
Style Units - Achieve 100% completion on your profile by getting all artifacts and relics in the game to unlock the Style Units level (Rewards > Special).

Here's a neat video walkthrough of the Lost Valley level, in case you had trouble with it: