The Humble Bundle Mojam 2 is live, featuring Mojang and friends game jamming for the next 78 hours to create games just for the event. Unlike other Humble bundles, 100% of the proceeds will go towards charities. The two charities for this event are the staple Electronic Frontier Foundation and Block by Block, which is "a wonderful collaboration between Mojang and UN Habitat to bring youth into the urban planning process for better cities."

Fans can pay what they want now for six new game prototypes from Mojang, Oxeye, Wolfire, Vlambeer, Ludosity, and Grapefrukt, which will be released after the bundle drive ends.