Unity Technologies, the San Francisco company behind the eponymous multi-platform game development platform, has now closed its first round of funding. The Series A financing was led by Sequoia Capital like we reported last week and apparently also included some Silicon Valley notables like David Gardner, the CEO of Atari, and Diane Greene, founder and former CEO of VMware.

Unity combines a development platform with a 3D game engine in a software package that enables high performance 3D interactive content for Web, Mac, PC, iPhone and Nintendo Wii games. The platform is currently used in games like Tiger Woods PGA Tour Online by ElA, the Quest for R2D2 by LEGO and FusionFall by Cartoon Networks.

Earlier this year, Unity for iPhone was released and the company says more than 325 games are using its engine to power their iPhone games today.

The company has recently moved its home base from Copenhagen, where it has been operating for years, to San Francisco, though its core development team is still in Copenhagen.

Roelof Botha, partner at Sequoia Capital, and Greene will be joining the board of directors.