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