Here is the full list of all 40 Midnight Fight Express achievements.
Kill 4000 enemies.
Kill 50 enemies using ground finishers.
Complete your first 25 challenges.
Collect 150 golden teeth.
Mute the music.
Shoot 500 enemies.
Kill 75 enemies using explosives.
Complete a level without getting hit.
Blow up 50 enemy heads with secondary gun.
Electrocute 100 enemies.
Kill 250 enemies using melee finishers.
Defeat 15 enemies with different types of kills on a single level.
Kill 2000 enemies.
Finish the game.
Let 100 enemies kill each other.
Get 100x combo on foot.
Complete the Alleyway mission.
Kill 50 enemies using wall finishers.
Complete the Highway mission.
Spend 50000$ on clothes.
Parry 150 attacks.
Kill 6 enemies while in Rage.
Complete the Wavechase mission.
Kill 500 enemies.
Complete the Factory mission.
Kill 500 dummies in the Playground.
Die 500 times.
Get an S-Rating on 20 levels.
Get an S-Rating on all levels.
Complete all challenges.
Throw 250 environmental items at enemies.
Kill 150 enemies using weapon finishers.
Kill 50 enemies using gun finishers.
Stick 50 sharp weapons into the heads of enemies.
Slice 75 enemies.
Escape from grapples 50 times.
Talk with all special characters.
Complete all levels on hard difficulty.
Complete all levels on realistic difficulty.
Damage 100 enemies using rope.