I want to create a 2.5D FPS, but I can't really code so I would need the skeleton of the game. The sprites must move with the camera as seen in old school games like Doom or Shadow Warrior. However I cannot find this anywhere. I have extensive experience on every other field as a modder. In fact I could make the game in GZDoom but I want something better, with multiplayer support and with a lot of documentation in case I need help, and no copyright attachments to anything that could give me problems in the future, so Unity is the only thing I can think off, I just need the template to start working on top of something and not from scratch which is impossible for me. Any ideas??