Here is the full list of all 12 Hairy Little Buggers achievements.
Congrats! You've started digging your first fortress!
Cut down a tree & make logs.
Have a Forester plant a seedling.
Slaughter a Goblin.
Recruit a Knight.
Drop a Throne blueprint.
Drop an Altar blueprint
Win a map by finding the Arkenstone deep within the ground.
Have no Dwarrow alive
Your Queen is dead, her lineage ended. Shuffled off her mortal coil, to encounter darkness, and rot away.
Have one of your Knights send a demon back from whence it came.
Train and equip a plague doctor to combat the foul miasma.