Nimbly Games has announced a free weekend on Steam for their flying multiplayer title Altitude, which has already officially kicked off. If you want to get in on the action, head over to your games section on the Steam client and you’ll have the option to download and play the game for free through Sunday. The multiplayer-heavy title is available on PC and Mac and includes cross platform play.

If you find yourself having a good time, your mood will be bettered by knowing the game goes for half price through the event. $5 will net you both PC and Mac versions of the game.

The goodies appear to be in celebration of the currently in motion Penny Arcade Expo, as the game is a PAX 10 Finalist for this year’s event. Both the sale and free weekend end early Monday, September 6.