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