Volkograd 3D is a GZDoom mod that puts Wolfenstein 3D in Red Alert's Universe. You play as Agent Tanya Adams as she fights her way behind enemy lines towards Moscow where she must fight Josef Stalin himself. Volkograd 3D has 3 planned chapters. The first chapter would be Tanya's escape from Volkograd fortress
Not the entirety of Volkograd would be dark, but it's a neat detail to just throw in. Could help in dark levels!
Also, the pickup lines. When you pick up objects, their proper names are displayed, but the weapon tags are their general names.