The game you are looking for, , was an ambitious 1,000-player battle royale developed by Automaton. However, it is no longer available for download or play. Current Status
The game was the talk of E3 2018, but the ambition proved too heavy for its foundation. In late 2019, Automaton Games faced "insufficient funding." The project was shuttered mid-development, leaving behind only cinematic trailers and a handful of tech demos. mavericks-proving-grounds-download-free-full-version
Any site claiming to offer a "free full version" of Mavericks: Proving Grounds is likely a scam or contains malware, as the game servers required for play were never completed and do not exist. The game you are looking for, , was
The game never made it out of its early development and beta testing phases. In late 2019, Automaton Games faced "insufficient funding
Today, Mavericks exists as a cautionary tale of "feature creep" and the challenges of scaling multiplayer technology. While games like Warzone have pushed player counts higher, the 1,000-player milestone remains an unconquered peak in the battle royale genre.