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