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