Here is the full list of all 26 SUPERHOT achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Get RED ending in every level of SPEEDRUNrt challenge.
Find all secrets.
Launch every app in the system.
Beat all Challenges.
Get RED ending in every level of SPEEDRUN challenge.
Unlock all endless levels.
Kill over 1987 Red Dudes in endless mode.
Kill 3 Red Dudes with one shotgun shot.
Kill 100 Red Dudes with a katana.
Kill 100 Red Dudes with a rifle.
Kill 100 Red Dudes with a shotgun.
Kill 3 Red Dudes with one rifle burst.
Complete the game.
Score 100 headshots.
Get back to the system after being expelled.
Kill 100 Red Dudes with a pistol.
Cut bullet with a katana.
Kill 2 Red Dudes with one katana throw.
Kill 100 Red Dudes using melee.
Kill an enemy by jumping on him.
Become part of the community.
Upload a replay on killstagram.com
Complete SERV level.
Complete SUBWAY level.
Shoot down a bullet with a bullet.