The Opposable Thumbs blog covers a 48-hour-long "game jam" at the Queensland University of Technology in Australia. Twenty teams of game developers — 16 indie and four professional — compete over a weekend to build a functional game based on a few deliberately vague keywords. This article documents the brainstorming sessions and the early prototyping work. Quoting: "The teams become less talkative as midnight draws near and the individual team members all settle down into their jobs. Everybody seems determined to not let sleep take over just yet. I take a tour of some of the other teams. Badgers are being animated, leg movements first with static bodies above them. Other teams have no art yet and just use colored rectangles as they get the mechanics down. Others are still sketching beautiful concept art and coding level editors.'To move around the room is to hear random snippets of creativity and math. 'If we move the z-axis, too, we can do this thing' or 'what if we procedurally generated that object.' In this one spot, sixteen games are coming into being that weren't even concepts eight hours ago."