InstantAction.com games are now playable on the Mac (as an open beta for the moment). Mac users can sign up and play the spiritual successor to Tribes, Fallen Empire: Legions. System requirements call for Mac OS X 10.4.11 or later. InstantAction runs on Intel Macs only, and requires Safari 3 or Firefox 2. Some games require an Nvidia GeForce 7 series, Radeon x1900 series or better.