Grim’s Haunted Carnival

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Season’s greetings, Eyewirers! The Halloween season, that is. It’s our beloved Grim Reaper’s favorite month. Last year, as you may recall, he sought some caretakers for his haunted mansion while he took his annual vacation to gear up for crunch time. Now we seem to have a sequel quest on our hands! We’ve got it on authority from Grim himself that he’s been hard at work preparing a new, neurotastic, and appropriately spooky theme park… and he wants you to try it out.

That’s right: we’ve got a special week in Grim’s Haunted Carnival all to ourselves. Prepare for some thrills and chills, not to mention plenty of pumpkin spice cotton candy, and join us for the big opening day on October 19th! We can’t wait.

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*All times are Eastern Daylight Time (EDT).*

Accuracy Happy Hours

First session runs from 2:00 PM to 4:00 PM on Friday 10/19accuracy happy hour, eyewire happy hour, eyewire, accuracy, citizen science
Second session runs from 10:00 PM to midnight on Friday 10/19

Out on the midway, an eerie neuromonster calls you to try out a squirt gun target range. The prizes certainly look good.

Swag: Most accurate player completing at least 20 cubes wins 1 t-shirt and 1 sticker sheet! Second and third place each also win sticker sheets. (And thanks to @susi for sponsoring this year’s swag again!)

1st Place Accuracy – 10,000 points
2nd Place Accuracy – 8,000 points
3rd Place Accuracy – 6,000 points
Achieve 95% Accuracy – 5,000 points
Achieve 90% Accuracy – 3,000 points
Achieve 80% Accuracy – 2,000 points
1,000 points for anyone under 80% who still plays at least 20 cubes in either slot.
(These bonus thresholds are non-cumulative, i.e. they will not combine. If you earn 3rd place, for instance, and presumably got over 95% accuracy, you still earn a 6,000 point bonus, not 11,000.)

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Begins at 12:00 AM (midnight) on Saturday 10/20
Ends at 12:00 PM (noon) on Thursday 10/25

You’d love to take a ride on that creepy carousel, but it’s developed a bit of a merger problem. Can you identify all of the spots for Grim’s minions to clean up?

Swag: The top scoring player will win 1 mug and 1 sticker sheet! Second and third place each also win sticker sheets.

Each merger found – 1,000 points
7,500 additional points if all 12 are found
200 point bonus available on each merger to the player whose guess is closest
250 point bonus available to any player who guesses within 10 voxels of a merger

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Begins at 11:00 AM on Sunday 10/21
Continues until 11:00 AM on Tuesday 10/23
Finishes with Power Hour from 11:00 AM to 12:00 PM on Tuesday 10/23

Another neuromonster awaits you in the fortune teller’s tent. Gaze into its crystal ball and answer its questions; you might just discover your destiny.

Swag:The top scoring player will win 1 mug and 1 sticker sheet! Second and third place each also win sticker sheets.

For every question —
1st to answer – 300 points
2nd to answer – 200 points
3rd to answer – 100 points

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Ferris Wheel vs. Roller Coaster

Begins at 11:00 AM on Tuesday 10/23
Ends at 11:00 AM on Wednesday 10/24

Time’s getting limited here at the carnival. If you could only take one of these rides to the very height of the park, which one would you choose?

Swag: 1 shirt, 1 mug, and 3 sticker sheets will be raffled among the top 50% of players on the winning team!

Earn 2,000 points – 1,000 bonus
Earn 10,000 points – 5,000 bonus
Earn 20,000 points – 10,000 bonus
Every additional 20,000 points – 10,000 bonus
Winning team – 10,000 bonus
Team winner – 5,000 bonus
#1 overall score – 10,000 bonus
#2 overall score – 5,000 bonus
#3 overall score – 2,500 bonus

The Skelethon

Begins at 8:00 AM on Wednesday 10/24
Ends at 8:00 AM on Thursday 10/25

It’s past closing time, and things seem a lot spookier at night. Do you dare to spend the next 24 hours riding the spine-tingling Skelethon?

Swag: 1 shirt, 1 mug, 1 poster, and 3 sticker sheets will be raffled among the top 25% of participating players!

Bonuses: For every 25 cubes you trace, you earn 3,500 bonus points!


  • Each player who traces at least 50 cubes will win the right to vote on a name for the marathon cell.
  • Each player who traces at least 200 cubes will win the right to nominate a name for that vote.

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Grim’s Haunted Carnival Closing Ceremony

Begins at 4:00 PM on Friday 10/26

Come celebrate the end of this competition, where admins will recognize everyone’s achievements. As always, we will include a round of promotions for Scouts, Scythes, Mystics, Moderators, and Mentors. If you’d like a promotion, you can request them here.

Artwork by Daniela Gamba