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