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