Here is the full list of all 21 High Hell achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Beat the game.
Die in under 5 seconds.
Beat level 15.
Beat level 10.
Beat level 05.
Steal the Soulshot.
Found the first DMEN doll.
Found ten DMEN dolls.
Found all the DMEN dolls.
Killed all the pups.
Get killed in the tutorial level.
Beat Professor Meth without killing any chimps.
Beat a level in under 5 seconds.
Beat level 2 without shooting.
Excel at a workout.
Beat level 7 without being shot.
Get a global highscore of over 3,300,000 points.
Get 15:00 or less on the best times sum.
Burn everything.
Speedrun the game in 20 minutes or less.
Score a goal.