Here is the full list of all 30 SEUM: Speedrunners from Hell achievements.
Finish one zone in Speedrun mode
Die 666 times.
Complete one Heliku.
Set your mouse on fire!
Finished 100% of the game... or did you?
Return all yours beers.
Perform head-banging.
Perform Butt First on one level.
Master of all four powers.
Get killed by everything.
Set balerina score on one level, and be fabulous.
Just keep swimming.
Shoot fireball 666 times.
Retry 666 times.
Top a friends score on the Leaderboard.
Jump 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.
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.