Version 4.21 has been assessed as improved optimization for mobile platforms. As a result, new features have been added to enhance multiplayer support and improve the development of Virtual Reality (VR), Enhanced Reality (AR) and Mixed Reality (MR) have been improved. The game has been added to general users of the industry. The ease of development for multiplayer support has also improved. The addition of an additional graphics plug-in feature reduces the CPU cost of computer network data to produce large-scale multiplayer gaming. It has also added the ability to detect and mitigate DDoS (Distributed Denial of Service) attacks through UDP Spoof packets.
"We would like to thank the Unreal Engine community developers who have submitted their comments on this update to include 121 improvements," said Park Sung-chul, president of Epic Games Korea.