The best interpretation is that "18.09" likely refers to a date — September 18th — and users are searching for a mod or version that was uploaded or updated around that time. The "polnaa versia" (full version) suggests users want access to all game content without restrictions.
Keep a reputable, updated antivirus program running on your device to block unauthorized background installations. To help you find what you need safely, tell me: Share public link skacat fapwall 18 09 mod polnaa versia free best