This was the release this scavenger hunt game was about: http://mugenmultiverse.fanbb.net/t10228-heimdall-by-arkady-released-for-mmv-s-5th-birthday
For those of you wanting to see how the scavenger hunt for hints played out, will post everything now.
Remember, it was basically a trail of logic questions + hidden hyperlinks + spoilers with a simple task to perform at the end.
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Clue #1 from first post of this topic: Look for a certain high profile request for help for your first clue
This led to looking at this topic: http://mugenmultiverse.fanbb.net/t10138-volzzilla-requests-help-with-replies-in-the-topics-listed-here#119904
It had an embedded hyperlink for the next clue of: http://mugenmultiverse.fanbb.net/t7246-mfl-duels-sign-up-registration-get-500-bonus-points-if-participate
In that topic had this clue behind a spoiler: The main creator of Blade, a character we hope is released soon, was recently given a certain wish. Find your next clue there.
This was referring to fede de 10 recently being wished a Happy Birthday.
Scanning that topic at: http://mugenmultiverse.fanbb.net/t143p1035-happy-birthday-to-fede-de-10-and-theredbeast
...led to this comment behind a spoiler: Helping creators out with constructive criticism is great, we wish MMV had more people who did so. Find a topic discussing this concept for you next hint.
That was a clue to find this topic: http://mugenmultiverse.fanbb.net/t4834-what-makes-a-good-m-u-g-e-n-feedback-giver
...which had an embedded hyperlink in a post on the first page of the topic of: http://mugenmultiverse.fanbb.net/t9618-resident-evil-the-final-movie#114819
Going to that topic asked the forum member to perform this task: Play a game in the Mugen Arcade. When you are done take a screenshot and post a reply of it in that topic. After doing this, then give volzzilla or Doom a PM for your reward.
Do not give away why you were doing all this when posting your reply please.
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Those that attempted to play, we hope you had fun. The people who made it to the end were: The Erix, Delefresh, warecus, and Arkady (he knew the reward, he just wanted to play the game).
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Again, this is all done because we are celebrating our 5th birthday as a community. Check out the main event topic to find out everything: http://mugenmultiverse.fanbb.net/t10174-happy-5th-birthday-to-mmv-celebration-event-main-topic-plz-reply-to-give-a-b-day-wish