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