Steam News announces that a free weekend is now underway for Altitude, which is free-to-play between now and Sunday afternoon. The multiplayer airborne action game is also on sale between now and Monday at 50% off. Finally, capping off this spate of Altitude-mania, a new patch is now available for the game, which has changes and bug-fixes, along with a lengthy list of new maps which cover the full range of skill levels.