Complete the indicated task to unlock the achievement.

Achievement	How to unlock
'Tis but a scratch	Kill 500 Knights.
...till dawn	Find the Duskdude.
An Honorable Duel	Kill a Knight with a Claymore.
Anti-air Measures	Kill 500 Cacobots.
Arachnophobia	Kill thousand Spiderlings.
Arachophobia - Part 2	Kill thousand Spideys.
Arachophobia finale	Kill thousand Weavers.
Arena Secrets	Find all secrets in E1M6.
At the verge of destruction	Escape your castle.
Bring 'em down!	Kill thousand Cacobots.
Broken Parts	Find the Prodeus guy.
Bug exterminator	Kill 500 Bugdemons.
Castle's Hidden Goods	Find all secrets in E1M1.
Come get some	Complete the first episode on the hard difficulty.
Demonic presence	Kill 500 Succubuses.
Dodgy business	Kill thousand Succubuses.
Eight-legged Problem	Kill 500 Spideys.
Even they got annihilated...	Fight through the old village.
Fallen ruins	Reach the ruin complex.
Forest Secrets	Find all secrets in E1M3.
Girl... eternally interrupted	Find the Nightmare Reaper Character.
Got stuck?	Kill 500 Weavers.
Gravedigger's job	Send 500 ghouls back to the grave.
Guts and Glory	Find Caroline.
Headshot God	Kill 10000 monsters with headshots.
Headshot machine	Kill 500 monsters with headshots.
Headshot master	Kill thousand monsters with headshots.
Headshot newbie	Kill hundred monsters with headshots.
In the Midst of Evil	Find the Amid Evil character.
Interrupted Support	Kill 500 Necromages.
It's hip to be square	Find the Square in the corner.
Know your enemy	Find your first Bestiary entry.
Moderate rumble	Complete the first episode on the standard difficulty.
Necromancer's playground	Fight through the ruins.
Necromant's Treasures	Find all secrets in E1M5.
Necromantic Pwnage	Kill the Necromant hundred times.
Orc Mommy	Find the Hedongirl.
Pesky Spiders	Kill 500 Spiderlings.
Pest Control	Kill thousand Bugdemons.
Pig Slayer	Kill thousand Pigdemons.
Piggybank	Kill 500 Pigdemons.
Ranger would be proud	Kill thousand Shamblers.
Ready to die	Complete the first episode on the hardcore difficulty.
Real Deal	Kill 500 Shamblers.
Ruin Mysteries	Find all secrets in E1M4.
Sharpshooter	Achieve at least 30% of headshot percentage on any level
So the treasure hunting started...	Find your first secret.
Spooky scary...	Kill 500 Boneys.
Support Breaker	Kill thousand Necromages.
The wolf's den	Defeat the Necromancer.
The woods are calling	Travel through the ancient forest.
They started it!	Kill hundred monsters.
Throw my bones	Kill thousand Boneys.
Treasure Hunter	Find all secrets on all levels.
Unholy Cursade	Kill thousand Knights.
Village Secrets	Find all secrets in E1M2.
Walk in a park	Complete the first episode on the easiest difficulty.
You do what you gotta do	Send thousand ghouls back to the grave.