Mine was probably on a demo disc around 2000s. It was like a battle on some destroyed city, had futuristic tanks, aircrafts and anti-air. The tanks had WW1-style tracks, like they were huge and squeaky and the size of the whole side. The anti-air had Σ-symbols (faction maybe) and shot blue lasers. The closest I have come to is G-Police, but that’s not it. It was on Win98 most likely.