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