.umod file: how to open it on Windows

2 Windows apps register the .umod extension. Install one of them to open the file with a double-click.

• 
  Unreal Gold (OldUnreal Edition)

  Unreal Gold distributed with the unofficial OldUnreal patch. Approved by Epic Games.

  Free 227 ★ 678
• 
  Unreal Tournament GOTY (OldUnreal Edition)

  Unreal Tournament GOTY distributed with the OldUnreal patch. Approved by Epic Games.

  Free 469 ★ 678

Related guide: Change the default app for a file type in Windows