The Humble Bundle Mojam is an annual charity event in which the Mojang team and other developers create a series of collections ("bundles") of video games that are sold and distributed online at a price determined by the purchaser. Sales of bundles are split between the developers/creators, the Humble Bundle operators, and one or more charities including Child's Play, the Electronic Frontier Foundation, charity: water, and the American Red Cross, with the buyer able to set the revenue split between these groups.
 Humble Bundle Mojam
The first Mojam event took place on February 17, 2012 and lasted for 60 hours. During this time, Mojang crafted a brand-new game from scratch, called Catacomb Snatch. Using the results of a poll in which both the most and least voted for categories were mixed together, the game features an "RTS-shoot 'em up" genre and "steampunk-Ancient Egypt" theme. The Humble Indie Bundle website featured live-stream footage of the development, and took donations; those who donated received access to the game not only once it was completed, but when the developers released stable builds during the event. The bundle also featured Fists of Resistance from Oxeye Game Studio and The Broadside Express from Wolfire Games. Oxeye Game Studio's game used the secondary options from the poll, creating a "dungeon crawler-beat 'em up" with a post apocalyptic World War II theme, while Wolfire Games created a game with the same genre and theme as Mojang's Catacomb Snatch.
The 60 hours ended with a total of over $440,000 sales, and over 79,000 bundles sold. However, the sale was temporarily extended, allowing for "last chance" purchases. The sale officially ended with 81,581 bundles distributed for a total of $458,329.98. All funds were distributed to four charities: Child's Play, Electronic Frontier Foundation, charity: water and the American Red Cross.
 Humble Bundle Mojam 2
On February 20, 2013, Mojang announced the "Humble Bundle Mojam 2". Much like the first Mojam, Mojang took suggestions for potential game ideas and developed a game from them in 78 hours. During this Mojam, other developers including Oxeye Game Studio, Wolfire Games, Vlambeer, Grapefrukt Games, and Ludosity also are making games for the event.
All proceeds were donated to the Electronic Frontier Foundation and Block by Block, a Mojang charity project. Donations included a $100,000 donation by an anonymous donor. Notch shaved his beard after a $500,000 goal was achieved.
- The Hay Block was first discovered in a test screenshot located in the files of the game, Nuke the Dinosaurs, one of the games in the Mojam 2 bundle.
- Rose, Mike (15 February 2012). "Mojang, Humble Indie Bundle team up to make charity game". Gamasutra. Retrieved 3 March 2013.
- Rose, Mike (20 February 2012). "Mojang, Humble Indie Bundle game jam raises $458K for charity". Gamasutra. Retrieved 3 March 2013.
- "Introducing Humble Bundle Mojam 2!". Humble Mumble. Humble Bundle. 20 February 2013. Retrieved 3 March 2013.
- Owen (19 February 2013). "Mojam is happening tomorrow! Help inspire us!". Mojang. Retrieved 3 March 2013.
- Chalk, Andy (20 February 2013). "Humble Bundle Mojam 2 Livestreams the Excitement". The Escapist. Retrieved 3 March 2013.
- "MojangTeam: Someone just donated 100K!". Mojang. Twitter. 21 February 2013. Retrieved 3 March 2013.
- karthus25 (24 February 2013). "I found a new block hidden in one of the Mojam2 files (More info in comments)". Reddit. Retrieved 3 March 2013.
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