It's a remaster of 1995's shooter PO’ed. It fixes bugs present in the original game and brings several QoL features to enhance the gameplay, plus a new hardcore difficulty. However, these are togglable features which means the players can also play the remastered version with the bugs and without the QoL features. The remaster also supports widescreen modes with properly adjusted HUD. In addition, there are 15 achievements to hunt for. PO’ed: Definitive Edition can be played with enhanced controls, antialiasing and increased framerate up to 4K 144 frames per second performance.