Here is the full list of all 30 SEUM: Speedrunners from Hell achievements.
Get killed by everything.
Just keep swimming.
Retry 666 times.
Set balerina score on one level, and be fabulous.
Finish level in exactly 6.6 seconds.
Jump 666 times.
Perform head-banging.
Finish one zone in Speedrun mode
Set your mouse on fire!
Shoot fireball 666 times.
Best of the best.
Top a friends score on the Leaderboard.
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.
Master of all four powers.
Be alive longer then 6 minutes.
Play SEUM more then 66 hours.
Gotta catch 'em all.
High pitched story.