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