PlayTribes

PlayTribes was a planned browser-based version of Starsiege: Tribes, distributed though InstantAction.com's browser platform service, and was first announced on InstantAction's blog on March 17, 2009.  A standalone client of PlayTribes was developed and an early build was leaked in March of 2010.  Development on PlayTribes was canceled when InstantAction sold the Tribes franchise to Hi-Rez Studios in October of 2010.