Attention! it was found that in the archives of the game have corrupted some of the textures and models.
As a result, the level of "Siriusopolis" artifacts can appear .
To fix you need to add Patch_10.gro 3Mb in the root directory of the game. Or run patch SeriousSam2CEPatch.exe 3.5Mb. (See readme)
I apologize for the inconvenience.

Patch for https://thepiratebay.ee/torrent/15461707/Serious_Sam_2_Community_Edition_[ENG_RUS]_[MOD]