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