It turns out that Binding Of Isaac creator Edmund McMillen isn't just good at creating pixelated life-ruining games but also treasure hunts in the real world. A staggering ARG (alternate reality game) concluded at the weekend that resulted in a new character being unlocked in The Binding Of Isaac Afterbirth expansion on PC - still to come for PS4 and Xbox One - and it required people to actually bring 🅘shovels.

The ARG itself is as fiendish and complex as Isaac's basement so here we go. The Afterbirth DLC comes with a new game mode called Greed. This all💯ows you to battle waves of enemies that can be controlled by a button in the floor, earning coins to shop with. The longer you fight without turning the waves off, the more you'll make. However, the Donation Machine in this mode - a 'charity' box if you will, that allows you to unlock better items for future runs - only allowed players to put in 109 coins. This caused outcry in the Isaac community. Where was the 999 of old Isaac? What did this mean?

Dutifully, a patch arrived thaꦰt removed this bug. However, eagle eyed players noticed that this patch was added after the 109th hour of the game being on sale. Surely this had to mean something? There were no clues. Yet, and here's where things get interesting, keen eyed Reddit user caught sight of the new icon for the 'Generosity' Steam achievement for adding 999 coins to the Donation Machine:

He then translated those pixels into a that🌳 took people to an with an ꦰimage of Isaac character The Lost, 8 shadows and a map.

Then the below Tweet from Edmund McMillen sent the community into a frenzy. This image suggested that 80s vampire movie✤ The Lost Boys was a key clue.

McMillen followed this up with a Tweet mentioning the words "People Are Strange." Obviously this was no coincidence and led players to the opening of the film where the song plays over walls of wanted posters on Santa Cruz Boardwalk. Given that an ending within Afterbirth shows a wanted poster, and McMillen had been dangling that there were clues outside tꦯhe game, players headed out in search of clues in Santa Cruz. And then the brother of found the below.

From here on in there's some clue solving worthy of Sherlock himself. All listed by ℱthis very helpful ARG imgur from , here's the concise version.

tweeted these l🐓etters🅰 at McMillen and got the below response.

Now this is when things got ridiculous/brilliant. Knowing that they were on the right track, the community then switched out all the letters in the voicemail bar the 'We need to🦄 go deeper' for their corresponding numbers. And the results? A series of co-ordinates. For🌌 an address in Santa Ana. Number? 109.

A group of treasure hunters got together and using a clue from McMillen that saiꦗd "I found some change right under my feet. Awesome!' they dug up a figurine of Greed from the game. The parcel was three inches underground and wrapped in bubble wrap. Worth noting here is that when our sister site asked McMillen about the ARG before it got to this stage he replied only with the words "Bring a shovel." Sneaky.

Symbols on Greed's head led them to a Twitter account for the little character and, following the instructions of "give me a voice," they used ISAACISDEAD as a password to access it and send out tweets. Lo and behold, the below Tw👍eet appeared from the same account. You can see a full enthusiastic run down of this part of the saga on Reddit .

Not long after, The Binding Of Isaac Afterbirth received a new character for Greed mode. The Keeper is unlocked by entering 999 coins into the Greed Machine and ♛then blowing it up. He doesn't have HP in the traditional sense, only coins that will refill his health. Sadly the maximum of these is two so no infinite health for you if you pick up a dollar. The Keeper starts with triple shot though and of course has his own associated achievements just like other Isaac characters.

More than 500 people took part in the event, with thousands following on Twitter and Reddit. If this isn't enough of the mystery🐼 for you, McMillen will be revealing all in a detailed blog post this week but something tells me he won't be doing anything quite like this again in a while.

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