PUBG represents the standalone version of what Greene believes is the “final version” of the battle royale concept, incorporating the elements he had designed in previous iterations. Faster development was possible with the game engine Unreal Engine 4, compared with ARMA and H1Z1, which were built with proprietary game engines. Greene acknowledged that implementing the size of the maps in PUBG has been one of the challenges with working with Unreal, which was not designed with such maps in mind. The game was designed as a mix between the realistic simulation of ARMA 3 and the arcade-like action focus and player accessibility of H1Z1. To prevent in-game cheating, the game uses BattlEye anti-cheating software, which had permanently banned over 13 million players by October 2018. BattlEye indicated that 99% of all cheating software for the game was developed in China.