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