Successfully complete the indicated task to unlock the corresponding cheat:

All Weapons: Successfully complete all four Greece Time Trials.

Golden Shotgun: Successfully complete all three Lost Island Time Trials.

Infinite 50 Caliber Pistol Ammo: Successfully complete all four Peru Time Trials.
Infinate Breath: Successfully complete the game on the Easy difficulty setting.
Infinite Health: Successfully complete all three Egyption Time Trials.
Infinite Mini SMG Ammo: Successfully complete all three Egyption Time Trials.
Infinite Shotgun Ammo: Successfully complete all four Greece Time Trials.

Show Enemy Health: Successfully complete all four Peru Time Trials.
Silver Mini SMGs: Successfully complete all three Lost Island Time Trials.
Sunglasses: Successfully complete the game on the Easy difficulty setting.

Textureless Mode: Successfully complete the game on the Easy difficulty setting.

Artwork - Successfully complete the indicated task to unlock the corresponding Art Gallery:

Atlantean Creatures: Successfully complete the game.

Box Art: Collect 67% of the Artifacts in Peru.

Doppelganger: Collect 67% of the Artifacts in Lost City.

Egypt: Collect 100% of the Artifacts in Egypt.

Game Gallery: Collect 33% of the Artifacts in Greece.
Greece: Collect 100% of the Artifacts in Greece.

Items And Artifacts: Successfully complete the game with 25% of the Relics.

Kid: Collect 33% of the Artifacts in Egypt.
Kold: Collect 67% of the Artifacts in Egypt.

Lost City: Collect 33% of the Artifacts in Lost City.

Natla: Collect 100% of the Artifacts in Lost City.

Origins of Lara: Collect 33% of the Artifacts in Peru.

Other Characters: Successfully complete the game with 50% of the Artifacts.

Peru: Collect 100% of the Artifacts in Peru.
Pierre: Collect 67% of the Artifacts in Greece.
Promotional Images: Collect 50% of the Artifacts in Croft Manor.

TR:1 vs. TR:A Egypt: Collect 100% of the Relics in Egypt.
TR:1 vs. TR:A Greece: Collect 100% of the Relics in Greece.
TR:1 vs. TR:A Lost City: Collect 100% of the Relics in Lost City.
TR:1 vs. TR:A Peru: Collect 100% of the Relics in Peru.

Bonus costumes - Successfully complete the indicated task to unlock the corresponding costume:

Camouflage: Get the Relic from the Temple Of Khamoon.
Catsuit: Get the Relic from the Sanctuary Of The Scion.
Classic: Get the Relic from the Lost Valley.
Croft Manor Sport: Get the Athenian Owl Relic from Midas's Palace.

Doppelganger: Get the Relic from Natla's Mines.

Golden: Get the Griffin-Head Relic from Midas's Palace.

Legend: Get the Relic from the Mountain Caves.

Scorched Natla: Get all Relics.
Swimsuit from Tomb Raider 2 (Maria Doria level): Get the Relic from the Great Pyramid.

Biographies - Collect the indicated number of Artifacts to unlock the corresponding biography:

Doppelganger: 36 Artifacts

Kid: 14 Artifacts
Kold: 18 Artifacts

Lara Croft: 5 Artifacts
Larson: 9 Artifacts

Natla: 41 Artifacts

Pierre: 23 Artifacts

Richard Croft: 32 Artifacts

Winston: 27 Artifacts

Movies - Successfully complete the indicated chapter to unlock the corresponding movie:

A Heated Interrogation: Peru
A Tough Choice: Lost City
Ambushed!: Egypt
Arrival at Khamoon: Egypt
Arrival at St. Francis' Folly: Greece

Business Banter: Greece

Croft Manor: Croft Manor

Doppelganger Demise: Lost City
Down But Not Out: Lost City

Final Confrontation: Lost City

Introducing Natla: Peru
Island Arrival: Lost City
Island Escape: Lost City

Kold and Kid: Lost City

Larson Dies: Lost City
Late Night Reccoinsance: Peru

Motorcycle Pursuit: Egypt

Pierre's Demise: Greece

Retrieving The Scion: Egypt

Shadow Figures 1: Greece
Shadow Figures 2: Greece

The Awakening: Peru
The Banishment Of Natla: Egypt
The End Of The Line: Lost City
The Power Of The Scion: Lost City
The Tomb Of Qualopec: Peru
The Tomb Of Tihocan: Greece
Time to Leave: Lost City

Unexpected Company: Peru

Vilcabamba: Peru

Wolf Attack: Peru

Commentaries - Successfully complete the indicated chapter, then enter the Options menu to turn on commentaries. Replay the levels from that chapter, find the now available crystals, and activate them to hear a commentary from the game developers.

Croft Manor commentaries: Croft Manor

Egypt commentaries (Temple Of Khamoon, Obelisk Of Khamoon, and Sanctuary Of The Scion): Egypt

Greece commentaries (St. Francis' Folly, The Coliseum, Midas' Palace, and Tomb Of Tihocan): Greece

Lost City commentaries (Natla's Mines, The Great Pyramid, and Final Conflict): Lost City

Peru commentaries (Mountain Caves, City of Vilcabamba, The Lost Valley, and Tomb Of Qualopec): Peru

Style Units level - Get a 100% completion in your profile by getting all Artifacts and Relics in the game to unlock the Style Units level.

Croft Manor music theme - Successfully complete Croft Manor to unlock the Croft Manor music theme.

Saving Medipaks - If Lara is low on health and do not want to use a Medipak, wait until you get to a checkpoint. Then, save the game and load it. This will take you back to where you just were with a full health bar. This is useful as it saves Medipaks which you need later in the game. Alternately, if Lara is low on health and you do get to a checkpoint, kill Lara (for example, jump off a high ledge). This will also take you back to the previous checkpoint with a full health bar.

Turing gold - In Mida's Palace, step onto Mida's hand (which you use to turn the silver blocks into gold), and stay there for a short period of time to be turn into solid gold.

Easy Croft Manor maze - You must go through a maze at Croft Manor to collect Artifacts. The easiest way to go through the maze is to stick to the walls. By doing this, the camera will move to a view on top of Lara, and you can actually see what is on the other side of walls.

Better jumps - When jumping up stairs, pull out your gun(s), but do not shoot. Hop forward, and you will glide smoothly up the stairs.

Attacking raptors safely in Lost Valley - When you slide down the slope and the raptors charge at you, ready to attack, there is a rock where they cannot get you. As soon as you enter the valley, jump on the rock to your left. You will be able to shoot them, and they will not be able to attack you.