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