Block Arena is a multiplayer action game (an FPS game) but where the levels are "block worlds". The project was started around 2008. The project is a continuation of the (never fully finished) Infinifrag 2 project that Dan Hathaway developed in collaboration with Zach Barth after being so impressed by Zach's original Infinifrag. After Zach Barth left the Infinifrag 2 project, he would go on to make Infiniminer, the game that inspired Minecraft, however Dan continued to work on the Block Engine technology. The idea behind Block Arena is that a block map is easy to build by hand (or procedurally generate), which greatly simplifies level design. The maps themselves are intended to be similar to those in Unreal Tournament or Quake. Much of the code for Block Arena (and Infinifrag 2) was moved over for the new Fractal Block World game in 2012