I was thinking i remember a 2D arcade game i use to play Rampage transform into colossal monsters climb buildings punching buildings making antire buildings collapse
so that was that, so no one has come up with 3D vesion of that game, now game engine can create entire photoreal city size like that matrix Unreal engine now imagine using that and Kyju Godzilla hollywood size smash building and collapse after cirtain amount of damage, also lock cities out until succesful destruction, start Adelaide Sth Australia then unlock Sydney, then unlock Brisbane, then unlock Tokyo Japan unlock Sanfransico, unlock New York, so unlock each city after successfull destruction of each city, also unlock different size Kydju, start small upgrade to more collossal up to Paciffic rim size also NPCs start fleaing also when skycrapers collasing massive plume of dust and debries, so there.