Update 1.08 was a significant milestone that introduced several new features and fixes:
: Enabled official integration for sharing and downloading community-made mods. File: Serious.Sam.4.Deluxe.Edition.v1.08.zip ...
The Deluxe Edition includes the base game plus several digital extras found on GOG.com and PCGamingWiki : : An exclusive in-game weapon skin. Update 1
: A collection of concept art, model renders, and poster art. Technical Specifications available in MP3 and lossless formats.
: The original score composed by Damjan Mravunac, available in MP3 and lossless formats.