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