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