Here is the full list of all 30 SEUM: Speedrunners from Hell achievements.
Master of all four powers.
Best of the best.
Top a friends score on the Leaderboard.
Get killed by everything.
Set your mouse on fire!
Set balerina score on one level, and be fabulous.
Finish one zone in Speedrun mode
Retry 666 times.
Finish level in exactly 6.6 seconds.
Perform head-banging.
Jump 666 times.
Shoot fireball 666 times.
Perform Butt First on one level.
Get the "Über Skull" time on one level.
Finished 100% of the game... or did you?
Hell Yeah! Now you can sleep.
Win 10 peaks.
Worship the Satan.
Complete one Heliku.
Play Endless mode 66 times.
Return all yours beers.
We salute you! \m/
Die 666 times.
Perform eight rituals.
Run 666m in the Endless Mode.
Be alive longer then 6 minutes.
Play SEUM more then 66 hours.
Gotta catch 'em all.
Just keep swimming.
High pitched story.