3. Click the blue button named “Save License Request” to save the License Request file. 4. Save the In this example we are licensing a Pro version of Unity. Unity is a game development ecosystem: a powerful rendering engine fully integrated with a complete set of intuitive tools and rapid workflows to create interactive. You're here because you want to download Unity, the world's most popular development platform for creating 2D and 3D multiplatform games and interactive experiences. Before you download choose the version of Unity that's right System Requirements. OS: Windows 7 SP1+, 8, 10; Mac OS X 10.8+. GPU: Graphics card with DX9 (shader model 2.0) capabilities. Anything made since 2004.