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