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