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