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