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.
Upload a replay on killstagram.com
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 100 Red Dudes with a rifle.
Become part of the community.
Kill 100 Red Dudes with a katana.
Kill 3 Red Dudes with one shotgun shot.
Cut bullet with a katana.
Complete the game.
Kill an enemy by jumping on him.
Kill 2 Red Dudes with one katana throw.
Kill 100 Red Dudes with a shotgun.
Score 100 headshots.
Kill 100 Red Dudes with a pistol.
Get back to the system after being expelled.
Kill 100 Red Dudes using melee.
Shoot down a bullet with a bullet.
Complete SERV level.
Kill 3 Red Dudes with one rifle burst.
Complete SUBWAY level.