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