Unity Technologies has released Unity 2.5, adding compatibility with Windows Vista, XP and 2000.
The update makes the multi-platform development engine available to the majority of computer users, with Unity on both Macs and PCs capable of developing a title for either system.
"Starting today, Windows users can finally get their hands on our baby that has been generating an incredible amount of excitement," said David Helgason, CEO of Unity Technologies.
"Unity has been used to create dozens of hit games and is already being used by thousands of developers on the Mac, and we have huge expectations of how far we and our community can go."
The engine has already been used in creating Cartoon Network's free-to-play MMO, Fusion Fall, as well as the popular browser game Off-Road Velociraptor Safari.