Serious Sam 4 Deluxe Edition V1.09-gog Patched -

"How do you do it?" a voice said from behind a slab of collapsed elevator. A woman in a jacket patched with other people's flags crawled free. Her eyes were two weathered maps. "We thought we were done for."

For those new to the series or looking to improve their gameplay experience: Serious Sam 4 Deluxe Edition v1.09-GOG

GOG often bundles the Deluxe Edition extras in a cleaner, more accessible folder structure. No digging through Steam’s "depot" folders. You get an Extras folder with the soundtrack (MP3/FLAC), art book (PDF), and wallpapers right after installation. "How do you do it

The iconic Tommy Gun skin for use in-game. Key Features art book (PDF)