Building for a single aspect ratio

Forcing a specific aspect ratio is possible in PC, Mac, & Linux Standalone builds. To do so, enable Display Resolution Dialog and check the aspect ratio you wish to use in the Supported Aspect Ratios setting.

The following screenshot shows a game being built with a 4:3 aspect ratio:

When you build and run your game with the preceding settings, a dialog option will open and the player will be allowed to choose from multiple resolutions that fit that setting. The following screenshot shows the resolution dialog window with multiple 4:3 resolutions available: