All Working Tomb Raider Underworld Cheats - Xbox 360

Achievements
Complete each achievement to get the allotted gamerscore:

Climber (5) - Execute a chimney jump of at least 2 wall kicks.
Coastal Thailand Expedition (75) - Coastal Thailand Expedition successfully completed.
Dedicated Treasure Collector (50) - Find 100 Treasures.
Dedicated Relic Collector (50) - Find 3 Relics.
Grenadier (10) - Kill two enemies with one grenade.
Master Speed Demon (10) - Beat all three Speed Demon challenges.
Master Survivalist (100) - Complete the game on hardest possible settings.
Master Climber (10) - Execute a chimney jump of at least 4 wall kicks.
Master Swan Diver (10) - In one adventure, swan dive off the three highest points over water in the game.
Master Treasure Collector (60) - Find all 179 Treasures.
Master Grenadier (10) - Kill three enemies with one grenade.
Master Relic Collector (70) - Find all 6 Relics.
Master Roadkiller (10) - Kill five enemies by running over them with the motorcycle.
Mediterranean Sea Expedition (50) - Mediterranean Sea Expedition successfully completed.
Prologue (25) - Complete the Prologue.
Relic Collector (30) - Find a Relic.
Roadkiller (5) - Kill an enemy by running over it with the motorcycle.
Skilled Treasure Collector (40) - Find 50 Treasures.
Speed Demon I (5) - Drive into Xibalba in under 45 seconds.
Speed Demon II (5) - Drove from the top of Valgrind to the bottom in under 50 seconds.
Speed Demon III (5) - Drive through the Valhalla Maze in under 40 seconds.
Swan Diver I (10) - In one adventure, swan dive off one of the three highest points over water in the game.
Swan Diver II (10) - In one adventure, swan dive off two of the three highest points over water in the game.
Treasure Collector (30) - Find 10 Treasures.
Weapons Expert (5) - Execute an Adrenaline Attack headshot on an enemy.
Weapons Master (10) - Execute ten Adrenaline Attack headshots.

Additionally there are seven secret achievements.

Mediterranean Sea Expedition (50) - Mediterranean Sea Expedition successfully completed.
Coastal Thailand Expedition (75) - Coastal Thailand Expedition successfully completed.
Croft Manor Expedition (25) - Croft manor Expedition successfully completed.
Secret achievement (100) - Unknown.
Secret achievement (50) - Unknown.
Secret achievement (25) - Unknown.
Secret achievement (100) - Unknown.

Unlock Lara's Bathing Suit
Complete the game on any dificulty setting and this becoms unlocked in treasure Hunt mode when you revisit the Mediterranean Sea Expedition.