wtf is painkiller-vr-mod?

PainKiller VR Mod adds virtual reality support to the original PainKiller video game, an old first-person shooter made by People Can Fly and published by DreamCatcher. The mod uses OpenXR, a standard that lets software talk to many different VR headsets, so the game can be played in headsets like the Meta Quest 2 instead of only on a flat screen. The README is direct about what it needs. It requires version 1.64 of PainKiller: Heaven's Got a Hitman and or PainKiller: Battle Out of Hell. The author only tested it against the PainKiller: Black Edition release on Steam, a Meta Quest 2 headset, and an app called Virtual Desktop that streams PC games to a headset, but the mod is expected to work with other OpenXR compatible headsets too since it relies on that shared standard rather than one specific device. Installing it is a manual, drag and drop process rather than an automatic installer. A person downloads a ZIP file from the project's releases page, then copies the executable and DLL files out of that ZIP's Bin folder into the actual game's own Bin folder, replacing or adding to what is already there. After that, turning the feature on means opening a plain text configuration file called config.ini and adding one line, Cfg.VideoVR = true, then saving the file. The README also notes that this mod plays nicely alongside other mods, as long as those other mods do not themselves modify the game's executable files. The same author has two related, separate projects listed: a cheats mod for PainKiller, and a side by side stereo 3D mod for the same game, for people who want stereoscopic 3D without full VR headset tracking. Overall this is a small, focused fan project. It does not add new content to PainKiller. Instead it changes how an existing, already owned copy of the game is displayed and controlled, turning a flat screen shooter from the 2000s into something playable in a modern VR headset.