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.
Beat all Challenges.
Kill over 1987 Red Dudes in endless mode.
Unlock all endless levels.
Get RED ending in every level of SPEEDRUNrt challenge.
Get RED ending in every level of SPEEDRUN challenge.
Become part of the community.
Launch every app in the system.
Kill 3 Red Dudes with one shotgun shot.
Kill 2 Red Dudes with one katana throw.
Kill 100 Red Dudes with a katana.
Kill 3 Red Dudes with one rifle burst.
Kill 100 Red Dudes with a rifle.
Cut bullet with a katana.
Complete the game.
Kill 100 Red Dudes with a shotgun.
Get back to the system after being expelled.
Kill 100 Red Dudes with a pistol.
Kill 100 Red Dudes using melee.
Score 100 headshots.
Complete SERV level.
Kill an enemy by jumping on him.
Complete SUBWAY level.
Upload a replay on killstagram.com
Shoot down a bullet with a bullet.