Serious Sam 4 Deluxe Edition V1.09-gog -

: The entire action-packed campaign can be played with friends online. Why the GOG Version? The version available on is entirely

Battle thousands of enemies on screen at once. Serious Sam 4 Deluxe Edition v1.09-GOG

, meaning it requires no activation or online connection to play after installation. However, please note that GOG GALAXY : The entire action-packed campaign can be played