While the "20 Gun Version" of Cadillacs and Dinosaurs is a popular fan-made modification (hack) often shared on social media and emulation forums, it is not an official Capcom release. To play it on a PC, you generally need an arcade emulator like MAME or RetroArch and the specific modified ROM file.
Since this is an arcade game, you cannot run it as a standard .exe file. You must use an emulator to bridge the gap between the original arcade hardware and your Windows environment. Download an Emulator: Cadillacs And Dinosaurs 20 Gun Version Free Download For Pc
Why hunt down this specific hack? Here is what makes the 20 Gun Version so addictive: While the "20 Gun Version" of Cadillacs and
Legality and Safety