You must have every part (Part 1, Part 2, etc.) in the same folder.
Find links to the where the game is sold. download-serious-sam-apun-kagames-part1-rar
The file name indicates that the game was split into multiple parts (this being "part1") to make downloading easier. To successfully play the game: You must have every part (Part 1, Part 2, etc
Primarily Ancient Egypt (in the First Encounter), featuring massive open environments and iconic landmarks. download-serious-sam-apun-kagames-part1-rar