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