SYSTEM REQUIREMENTS
MINIMUM:
Requires a 64-bit processor and operating system
OS: Windows 10 64-bit
Processor: 4-core CPU @ 2.5 GHz
Memory: 8 GB RAM
Graphics: nVidia GeForce 780/970/1050 or AMD Radeon 7950/280/470 (3 GB VRAM)
DirectX: Version 11
Storage: 42 GB available space
Additional Notes: Requirements are based on 720p rendering resolution at 30 FPS
RECOMMENDED:
Requires a 64-bit processor and operating system
OS: Windows 10 64-bit (1909)
Processor: 8-core CPU @ 3.3 GHz
Memory: 16 GB RAM
Graphics: nVidia GeForce 1080/2060 or AMD Radeon Vega64/5700 (8 GB VRAM)
DirectX: Version 11
Storage: 42 GB available space


You need the following releases for this ↓ :

Serious Sam 4 Deluxe Edition-GOG
Serious Sam 4 Deluxe Edition UPDATE v1.02-GOG
Serious Sam 4 Deluxe Edition UPDATE v1.03-GOG
Serious Sam 4 Deluxe Edition UPDATE v1.04-GOG
Serious Sam 4 Deluxe Edition UPDATE v1.05-GOG

-or-

Serious Sam 4 Deluxe Edition v1.05-GOG


https://store.steampowered.com/app/257420/Serious_Sam_4/