GeneXus X Evolution 3 includes a Windows 8 Generator. Below are the requirements to generate these applications:
1. PC with Windows 8.1 installed.
2. Microsoft Framework 3.5 installed. It's installed as a Windows feature (using "Turn Windows features on or off").
3. SQL Server (Express Edition supported) installed or accesible via network.
4. Windows 8.1 SDK - available for download here. Visual Studio (Express Edition is supported) is recommended to debug applications.