Here is the full list of all 35 Hotline Miami achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Get A+ on all the chapters
Unlock all achievements
Perform a 12x combo
Kill three or more enemies with the same brick in one throw
Perform every ground kill in the game
use all melee weapon at least once
Wear all masks at least once
Collect all the masks
Clear chapter 2 using Nigel the Bat
Beat the epilogue with secret ending
Solve the puzzle
Collect all the puzzle pieces
Kill two enemies with the same brick in one throw
Go to the car 60 times
use all guns at least once
use all throwing weapon at least once
Die 1000 times
Perform a 10x combo
Kill the crapping gangster with a fireaxe
Find Jones The Crocodile
Complete chapter five barehanded
Unlock all weapons
Perform a 8x combo
Kill the panthers using Brandon the Panther
Beat the epilogue
Beat the mainstory
Get an A+ on any chapter
Destroy 200 glass panels
Kill 1989 enemies
Kill 99 dogs
Perform a 6x combo
Throw a weapon at an enemy so that his weapon hits another
Use a human shield
Perform a 4x combo
Kill an enemy with a brick bounced against a wall