Full list of all 82 Sir Whoopass: Immortal Death achievements.
The base game contains 66 achievements, and there are 2 DLC packs containing 16 achievements.
"Defeat" The Immortal
Kill 1000 enemies
Release all the chains
Kill the Ent
Collect 50 Wheels of Cheese and make Sheo proud!
Kill 500 enemies
Loot 6 drunken orcs
Kill Big Boi
Collect 25 Wheels of Cheese
Dodge 100 times
Eat 100 Gnomes
Kill your first Grumpy Worm
Jump 500 times
Find and buy the HoverCraft 2500™
Kill an enemy using metal bars
Whoop Ass 10 times!
Get the Jetpack 2000 by cheating
Kill your first Billy Bob
Kill your first Skelton warrior
Kill your first Shotgun Knight
Kill 100 enemies
Make the Bard play another song while you are drunk
Drink five large grogs at the same time
Beat the first Flappy Knight level in the arcade machine.
Kill a Billy-Goat
Kill the clown in the sewers
Dodge 20 times
Jump 100 times
Have three grogs in total
Kill your first Fungoid Bob
Kill your first IRS guy
Eat your first grilled chicken
Drink your very first grog
Blow up yourself and an enemy with a dynamite barrel
Use the stinky outhouse
Pick up a Mistlefoe
Kill you first Grenadier
Collect 10 Wheels of Cheese
Get eaten by a shark
Put out the fire
Buy a surpise from Melisande
Find the marvelous Chickenator
Make the Bard play another song
Collect 5 Wheels of Cheese!
Jump 20 times
Kill your first Sven-Olof
Kill your first Orc Hipster
Kill your first Orc Warmaiden
Catch fire
Collect your first Wheel of Cheese!
Eat your first Garden Gnome
Read a book from a bookshelf
Kill your first Orc Noob
Get your very first lethal weapon
Live out your cowboy dreams and make a triple-shot
Kill a Grenadier with your bare hands
Eat 500 Gnomes
Collect at least 100 eggs
Get full strength when Level Up
Get full agility when Level Up
Get full luck when Level Up
Get full protection when Level Up
Dodge 500 times
Visit a place you shouldn't actually visit
Kill yourself with metal bars
Spoil the Bard so he can afford new and fancy clothes.
Complete the dungeon 100%
Find a pair of Deal-with-it glasses
Find all 6 pairs of Deal-with-it glasses