Here is the full list of all 30 SEUM: Speedrunners from Hell achievements.
Jump 666 times.
Perform Butt First on one level.
Finish one zone in Speedrun mode
Just keep swimming.
Shoot fireball 666 times.
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.
Play Endless mode 66 times.
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.
Get killed by everything.
Top a friends score on the Leaderboard.
Gotta catch 'em all.
Retry 666 times.
Set balerina score on one level, and be fabulous.
Perform head-banging.
High pitched story.