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