CHEATS - Minecraft

Unlockable Avatar Awards
A Minecraft Watch - Play the game for 100 day to night cycles.
The Creeper Cap - Kill a Creeper with Arrows.
The Pork-Chop T-Shirt - Earn a Cooked Porkchop.

Unlockable Gamerpics
Creeper Gamerpic - Kill 10 Creepers
Gamer Picture - Mine redstone

Unlock XBox Live Premium Theme
While at the pause menu, press Y to take a screenshot of the world and upload it to Facebook

Achievements
DescriptionAcquire Hardware - Smelt an iron ingot.
Bake Bread - Turn wheat into bread
Benchmarking - Craft a workbench with four blocks of wooden planks
Cow Tipper - Harvest some leather
Delicious Fish - Catch and cook a fish
Dispense With This - Construct a Dispenser
Getting an Upgrade - Construct a better pickaxe
Getting Wood - Punch a tree until the block of wood pops out
Hot Topic - Construct a furnace out of eight cobblestone blocks
Into The Nether - Construct a Nether Portal
Leader Of The Pack - Befriend five wolves
MOAR Tools - Construct one type of each tool (one pickaxe, one spade, one axe, and one hoe)
Monster Hunter - Attack and destroy a monster
On A Rail - Travel by minecart to a point at least 500m in a single direction from where you started
Taking Inventory - Open your inventory
The Lie - Bake a cake using wheat, sugar, milk and eggs
Time to Farm! - Use planks and sticks to make a hoe
Time to Mine! - Use planks and sticks to make a pickaxe
Time to Strike! - Use planks and sticks to make a sword
When Pigs Fly - Use a saddle to ride a pig, then have the pig get hurt from fall damage while riding it