It most likely refers to a PC game from the early-to-mid 2000s titled Extreme Racing (or a similar racing title).
Files from old pirate releases are frequently bundled with trojans, miners, or adware by third parties. Extreme.racing-DARKZER0.rar
Downloading copyrighted software via these archives is illegal in most jurisdictions. ZOSI EU - Shop for Security Cameras & Systems in Europe It most likely refers to a PC game
If you found this specific string in a blog post or old forum thread, it is usually in one of these contexts: Extreme.racing-DARKZER0.rar
Searching for or downloading files with this naming convention is :