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