Here is the full list of all 40 Redeemer: Enhanced Edition achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Feed the fish in Chapter 1
Complete the game on hardcore mode
Mince some meat in Chapter 11
Complete every chapter with 0 deaths.
Perform 100 stealth kills.
Shut down the engines in Chapter 15
Forward, Forward, High Punch. Chapter 12
Cook some kebabs in Chapter 5
Be careful with the glass in Chapter 10
Beat all Arena levels.
Add a bit of pacifism to this bloodbath. Chapter 6
Complete the game
Execute 300 enemies.
Perform 300 parries.
Kill 150 enemies using the environment
End the rivalry once and for all
Destroy more than 50% of the walls in Chapter 14
Shoot 500 enemies.
This is a zero-waste production facility. Chapter 13
Break 100 weapons
Defeat the guardians.
Be quicker than the big guys in Chapter 9
Restore 1000% of health
Kill 75 enemies using the environment
Clean out the greenhouse in Chapter 8
Kill three enemies simultaneously
Let the others do your work in Chapter 7
Restore health from near death to full
Parry 50 times
Kill 3 enemies while Vasily is near death
Kill five enemies simultaneously
Win the duel against an old firend.
Perform 40 stealth kills.
Shoot 50 enemies
Turn the ruins into a crypt in Chapter 4
Kill 25 enemies using the environment
Who's there? Chapter 3
Execute 30 enemies.
Do it the oldschool way in Chapter 2
Kill two enemies simultaneously