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