Here is the full list of Minecraft's Achievements, I didn't copy and paste so don't say that, I went on my 360 and just copied it word for word.

Total amount of Achievements: 20
Total amount of Gamerscore: 400G

Dispence With This
Construct a Dispencer.
20G
Craft: 7 Cobblestone
1 Bow
1 Redstone

Hot Topic
Construct a furnace out of eight cobblestone blocks.
15G
Craft: 8 Cobblestone

Into The Nether
Construct a Nether Portal.
40G
Craft: Obsidian blocks make it 2x3 (minimum), you then get a flint and light it

Time to Strike!
Use planks and sticks to make a sword.
10G
Craft: 2 Wooden Planks
1 Wooden Stick

Time to Mine!
Use planks and sticks to make a pickaxe.
10G
Craft: 3 Wooden Planks
2 Wooden Sticks

Benchmarking
Craft a workbench with four blocks of wooden planks.
10G
Craft: 4 Wooden Planks

Monster Hunter
Attack and destroy a monster.
20G
Craft: N/A

Getting Wood
Punch a tree until the block of wood pops out.
10G
Craft: N/A

Taking Inventory
Open your inventory.
10G
Craft: N/A

Acquire Hardware
Smelt an iron ingot.
15G
Craft: You'll need a Furnace, Coal and Iron Ore
Put the Coal in the Furnace along with the Iron Ore

Time to Farm
Use planks and sticks to make a hoe.
10G
Craft: 2 Wooden Planks
2 Wooden Sticks

Bake Bread
Turn wheat into bread.
20G
Craft: N/A

The Lie
Bake a cake using wheat, sugar, milk and eggs!
40G
Craft: You need a Crafting Table

Getting an Upgrade
Construct a better pickaxe.
15G
Craft: N/A

Delicious Fish
Catch and cook a fish!
15G
Craft: 1 Fishing Rod
Catch a fish then cook it

On A Rail
Travel by minecart to a point at least 500m in a single direction from where you started.
40G
Craft: Rail Tracks
Make a line of tracks with a Minecraft long as 500m then ride the Minecart.

Cow Tipper
Harvest some leather.
15G
Craft: Kill 1 Cow

When Pigs Fly
Use saddle to ride a pig, then have the pig get hurt from fall damage while riding it.
40G
Craft: 1 Saddle
Get on a pig and let it drop down 2 blocks while you're on it

Leader of The Pack
Befriend five wolves.
30G
Craft: 5 Bones, hold LT over the wolf, love hearts will come that means it's following you

MOAR Tools
Construct one type of each tool (one pickaxe, one spade, one axe and one hoe.)
Craft: 1 Pickaxe
1 Spade
1 Axe
1 Hoe