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