Here is the full list of all 34 Insanity's Blade achievements.
Die in the water
Get the Cock Puncher
Go corpse surfing
Set a hostage free
Throw 'em around!
Now you can throw daggers!
Rip an arm off 'em!
Deliver a punishing ball kick!
Tear 'em in two!
Play within punching distance!
Skip the How To Play Video
You beat the game!
You are an ARCADE MASTER!
Wow! 100% on all your saves!
Get all the pointy things!
Collect all the questy things!
Bought the 6-way magic daggers!
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
Beat the game on Casual difficulty
Play singleplayer on the day of love
Play co-op on the day of love
Complete the Arcade adventure!
The taste of true defeat
Revisit the How To Play video
Reach the max level!
Finish Stage 0 in Hell Mode
Get hugged by a crawler
Thurstan gets possessed
Use a continue on Stage 0