Race, joust, and play CTF on hoverbikes. No punching, kicking or weapons allowed, though. (Yes that complicates things, but don't worry. The riders can't seem to stay on their bikes anyway.)
This is the second free alpha of Hoverbike Joust. X-box 360 controllers or equivalents are recommended, but you can play with a keyboard and other controllers too (see readme.txt for details).
This build features improved in-air steering for the bikes and adds in-game menus for audio levels and some basic graphics options (toggle camera post-effects, vsync, and antialiasing). There's a lot more info in the included readme, including a full change-log and hints on how to control your hoverbike.
!!LINUX & MAC USERS!!: These builds are untested, as I don't have access to test hardware currently. Also, I'd strongly recommend remapping your controls in the launch window before you first play, as the defaults are for Xbox controller mapping in Windows, and I understand it is different in Linux/Mac and depends on the driver you're using etc.