- Get the "Über Skull" time on one level.

You just need to get "Über Skull" at any level.
To do this, You need to complete the level for a specified time.

- Shoot fireball 666 times.

Just... Shoot fireballs 666 times?...

- Jump 666 times.

Yep, just jump 666 times. This is all you need.

- Die 666 times.

Die, die, die, die, please die.

- Top a friends score on the Leaderboard.

You just need to beat your friend score. That all.

- Perform Butt First on one level.

Your Butt need to go in portal first, before you.
Simply turn your butt to the portal and go in. ;)

- Finish level in exactly 6.6 seconds.

You need to complete the level in 6.6 time.
I think the easiest way to do this on level 3. (Firestarter)

- Set balerina score on one level, and be fabulous.

You just need to make a circle in the air.
Jump + Turn the mouse in right (Or Left) on 180°

- Get killed by everything.

You need to die from all the traps in the game.
Spiks, saws, fire, fall from play zone. (Maybe Not all list "How to die", Because I did it randomly)

- Retry 666 times.

Just retry (Pressing R or Restart after "You Died" screen) 666 times. Do not need to do anything special.


(Again this picture, I know)

- Just keep swimming.

You need to do a special trick.
Your movements should be similar to swimming fish.
To do this, you need to jump and turn the mouse right and left. Actions like BunnyHop.

- Best of the best.

You need to be at any level in the top 10.
This is hard to do, Because in game there are other people besides you.
Try to find a level where you play well and try to get in the top 10.
(It was easy to do in the release of the game, because only a few players play)

- Perform head-banging.

You just need to shake your head.
Raise your mouse up and sharply down.
(Head-banging can make fireballs)

- Master of all four powers.

You need to try all power-up's.
- Teleport
- Anti-Gravity
- Split
- Spawn-Platform

- Finish one zone in Speedrun mode

In main menu go to speedrun, select floor and play it from the beginning to the end.

- Set your mouse on fire!

No. You do not need fast to drive the mouse on the table.
Go to settings, And do mouse sensitivity to 9.00

- Play Endless mode 66 times.

In main menu go to endless mode, and play it 66 times.

- Run 666m in the Endless Mode.

In endless mode try to run as far as possible, we need 666m.

- Be alive longer than 6 minutes.

We need to be alive 6 minutes (360 seconds on timer in game) and after just die.

- Worship the Satan.

At the 81 level (S(a)tan) show to satan your gesture. (Pressing G)

- Return all yours beers.

You need to collect all beer and bacon.
Find them themselves or find other guide.
Sorry.

- Win 10 peaks.

You need to climb the 10 peaks that are located on levels.
It's all peaks, There are more than 10, but you need only 10 for achievement.
You can climb on other peaks if you want to.

- Level 12 (Prison Escape):




- Level 14 (Blink):




- Level 16 (Peekaboo):




- Level 20 (Faster Than Death):




- Level 25 (Too Far):




- Level 39 (In Between):




- Level 43 (High Power):




- Level 44 (Going Under):




- Level 50 (Heist):




- Level 55 (Flytrap):




- Level 57 (Firewall):




- Level 61 (Sticky Walls):




- Level 63 (Wall Jump):




- Level 66 (Spider):




- Level 79 (Sleigh):




- Level 80 (BroadSword):




- Level H1 (Guitar):




- Level H5 (Farming):




- Level H6 (Harrier):




- Level H8 (Grappling Hook):

- Complete one Heliku.

You need to do one of the 8 rituals.
(To make the ritual look in "Heliku Master" achievement in guide)

- Perform eight rituals.

You need to do 8 rituals.
What rituals? On the -9 floor you find tips, that stand in the place where there should be a levels.
You can try to solve them.
But if you do not want, here all 8 rituals.

- Ritual 1:

Go to level 67 (The Walk), make "Balerina" on a thin stick 6 times, and you have to complete the level at time (On Skull medal or Über Skull medal)



- Ritual 2:

Level 24 (Babel), you need to pass the level at time without spawn platforms. You can move on decorations near map.



- Ritual 3:

We need level 10 (Charge!!!), you need make "Salmon" (Swimming like fish) trick above fireballs.



- Ritual 4:

Level B8 (FireCraft), just destroy blocks with your "Headbang" (Headbang spawn fireballs) until you get "Ritual Performed!"



- Ritual 5:

Level 13 (Jumping Jacks), just spam your "Gesture" (Pressing G, But I think better re-bind "Gesture" on Q for this ritual) and finish the level.
Yep, I know that you need make "Gesture" on each platform. But spam is not it easier?



- Ritual 6:

Level 31 (The Long Road), You need jump on first platform make "Headbang" and press R for retry. This must be done 3 times and you get "Ritual Performed!"



- Ritual 7:

Go to level 41 (Lab Rat) and complete level without pressing "Forward", Good Luck.



- Ritual 8:

Level 66 (Spider), complete level without pressing any move button.
Tip: You can take power-up's with your fireballs.

- Finished 100% of the game... or did you?

You need collect all "Skull" medal, "Über Skull" medal, beer and bacon on next levels:

- Level 1-10
- Level B1
- Level 11-20
- Level B2
- Level 21-30
- Level B3
- Level 31-40
- Level B4
- Level 41-50
- Level B5
- Level 51-60
- Level B6
- Level 61-70
- Level B7
- Level 71-80
- Level B8
- Level 81-83 (To get it level 83 you need find bacon on level S1)
- Level S1 (To get it, in level 82 just fall down)

- High pitched story.

After when you make 8 rituals (Look "Heliku Master" in guide) at levels where you make rituals look around your spawn, there you will find big black cube, now you can crash them and go in secret level. Try them all, and find all Presents on this levels (Replace beer)
Then you can turn "Hellium" in bonus menu (In Settings), turn this option "On" and go to main menu in extra and watch any video and you get achievement.
Thank to "Stalker13377" for help with this achievement.

- Gotta catch 'em all.

Go to level 30 (Pyramid), before you go in portal look back and you find skeleton and PokeBalls around him, go in skeleton and you get achievement.
Thanks to "Leon [BR]" to help with this achievement.

- Speedrun all levels without dying!

Most Hard Achievement in game.
You need go to speedrun menu and choose "All Levels" and turn on "Hardcore Speedrun"
Try to complete all levels without dying. Good Luck.
(Yep, i get this achievement first in all world :3)

- Hell Yeah! Now you can sleep.

You need to finish "Bonus Stats" on 666%
At first you need find all peaks. (You can find all peaks in "The Climber" section of this guide)
You must complete all 8 secret levels on "Über Skull" and collect all presents on them, after you pass all 8 rituals.
Then you should finish the level 66.6 (6.6.6) and find beer on this level, to get them just fast press space button between level 66 and 67 in select level menu.
To complete a level 66.6 you need to play it in special time, but you just can change the time on your computer manually.
Also you need to complete S1-S5 levels, to get them just fall down in level 82 (Beer Heaven) and you get level S1, finish this level on "Über Skull" get bacon on the midle and go in portal on the right or left side of the map and you get levels S2-S5, finish this levels on "Über Skull" and find all beers on this levels, now you need find last secret beer.
This beer not on levels, this beer on level select menu, try to find them. I do not know spawn this beer random on level select screen or he have special place, i find this beer between level 44 and 45.

- Play SEUM more than 66 hours.

In update #2 developers add "Bonus Stats" in extra menu, there you can find section "Time Played"
You need make "Time Played" to 66 hours. Time spent in game not considered, you need be on levels 66 hours, in "Time Played" section game considers only time spent on levels.
Just... Just start level and idle?...