Here is the full list of all 34 Insanity's Blade achievements.
Beat the game on Casual difficulty
Play singleplayer on the day of love
Play co-op on the day of love
Play within punching distance!
Finish Stage 0 in Hell Mode
Rip an arm off 'em!
Set a hostage free
You beat the game!
Get hugged by a crawler
Collect all the questy things!
Reach the max level!
Thurstan gets possessed
Deliver a punishing ball kick!
Bought the 6-way magic daggers!
The taste of true defeat
Get the Cock Puncher
Go corpse surfing
Die in the water
Use a continue on Stage 0
Now you can throw daggers!
Tear 'em in two!
Throw 'em around!
Skip the How To Play Video
Revisit the How To Play video
You are an ARCADE MASTER!
Wow! 100% on all your saves!
Get all the pointy things!
Upgrade Finn's axes to max level!
You like to live dangerously, no saves!
Go through HELL with no saves!
Hey! We thought you liked it rough!
Beat a walking level without crouching.
Pay your dues to the zombie priests
Complete the Arcade adventure!