The file you mentioned is a compressed archive containing the game files and the "crack" (software used to bypass Digital Rights Management, or DRM). Release Characteristics
Because these files are distributed via unofficial third-party websites (like torrent sites), they are often used as "wrappers" for viruses, miners, or trojans. Always scan such files with a reputable antivirus.
SiMPLEX releases are known for high-quality compression to minimize download times.
They often include a "SiMPLEX.exe" or a pre-cracked game executable, making the game playable immediately after extraction without needing a separate "crack" folder.