Tomb Raider Underworld cheats and cheat codes for Xbox 360

Achievements:
Complete the following achievements to award the indicated amount of
Xbox Live Gamerscore points.

Weapons Master (10 gamerscore points):
Perform 10 Adrenaline Attack headshots.

Weapons Expert (5 gamerscore points):
Perform an Adrenaline Attack headshot on an enemy.

Treasure Collector (30 gamerscore points):
Find 10 Treasures.

Swan Diver I (10 gamerscore points):
In one adventure, swan dive off one of the 3 highest points over
water in the game.

Swan Diver II (10 gamerscore points):
In one adventure, swan dive off two of the 3 highest points over
water in the game.

Master Swan Diver (10 gamerscore points):
In one adventure, swan dive off the 3 highest points over
water in the game.

Speed Demon III (5 gamerscore points):
Drive through the Valhalla Maze in under 40 seconds.

Speed Demon II (5 gamerscore points):
Drove from the top of Valgrind to the bottom in under 50 seconds.

Speed Demon I (5 gamerscore points):
Drive into Xibalba in under 45 seconds.

Skilled Treasure Collector (40 gamerscore points):
Find 50 Treasures.

Roadkiller (5 gamerscore points):
Kill an enemy by running over it with the motorcycle.

Relic Collector (30 gamerscore points):
Find a Relic.

Prologue (25 gamerscore points):
Finish the Prologue.

Master Treasure Collector (60 gamerscore points):
Collect all 179 Treasures.

Master Survivalist (100 gamerscore points):
Finish the game on hardest possible settings.

Master Speed Demon (10 gamerscore points):
Clear all three Speed Demon challenges.

Master Roadkiller (10 gamerscore points):
Vanish 5 enemies by running over them with the motorcycle.

Master Relic Collector (70 gamerscore points):
Collect all 6 Relics.

Master Grenadier (10 gamerscore points):
Perish 3 enemies with one grenade.

Master Climber (10 gamerscore points):
Perform a chimney jump of at least 4 wall kicks.

Grenadier (10 gamerscore points):
Perish two enemies with one grenade.

Dedicated Treasure Collector (50 gamerscore points):
Collect 100 Treasures.

Dedicated Relic Collector (50 gamerscore points):
Collect 3 Relics.

Climber (5 gamerscore points):
Perform a chimney jump of at least 2 wall kicks.

Seven secret achievements:
Unknown.