Full list of all 12 DeathSpank achievements worth 200 gamerscore. It takes around 10-12 hours to unlock all of the achievements on Xbox 360.
Reach Level 20
Kill Lord Von Prong
Discover all 30 Teleporting Outhouses
Destroy all 3 Queen Greems
Complete 6 Spelunker Quests
Finish 50 Side Quests
Kill 2500 Enemies
Kill Sergeant Orque
Drink 50 Potions
Resurrect at an Outhouse
Kill 100 Chickens
Dispense the Good, Vanquish the Evil