Here is the full list of all 30 SEUM: Speedrunners from Hell achievements.
Run 666m in the Endless Mode.
Gotta catch 'em all.
Die 666 times.
Master of all four powers.
Finish one zone in Speedrun mode
Play Endless mode 66 times.
Best of the best.
Top a friends score on the Leaderboard.
Set balerina score on one level, and be fabulous.
Perform head-banging.
Retry 666 times.
Just keep swimming.
Get the "Über Skull" time on one level.
Set your mouse on fire!
Be alive longer then 6 minutes.
Jump 666 times.
Get killed by everything.
Shoot fireball 666 times.
Perform Butt First on one level.
Finish level in exactly 6.6 seconds.
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.
We salute you! \m/
Perform eight rituals.
Play SEUM more then 66 hours.
High pitched story.