Here is the full list of all 41 Unshaded achievements.
Make first kill
Make 3 combo
Make 150 kills
Make 200 kills
Kill the hunter
Kill 10 hunters
The robot has been destroyed
10 robots destroyed
Destroy 10 machine guns
Kill an enemy by C4
Earned S Rank 10 times
Earned S Rank 50 times
Earned S Rank 100 times
20 levels dead-free
20 levels killing everyone
Kill 10 times with a mine
Blow up three of them
Kill 15 times with a trap
20 kills by shuriken
Blow up 10 barrels of shuriken
Shut down 10 robots
Lock the door 5 times
Turn off the portal 5 times
Make 3 kills combo
Make 6 kills combo
5 Killings in smoke
Has opened all the skins
Passed through 100 levels
Use Teleport 5 times
Use harpoon 5 times
Use the 'Fast blade'
'Fast blade' triple kill
5 Killings in shadow
Break 20 boxes
Make 5 combo
Make 6 combo
Turn off the rocket
Find the secret
Find all the secrets
Make 50 kills
Make 100 kills