If it’s PPC only, I would imagine it won’t run on your Intel machine. I’ve certainly never heard of PPC emulation to support PPC-only games, for example. I think your best bet would be to write to the game developer, but first try this: Open the location you installed the game to. This is probably the ‘Applications’ folder at the root of your mac hard drive. Select the game in the finder, and select ‘File’ > ‘Get Info’ on the menu bar. On the info window, tick ‘Run using Rosetta’. Close the window and try launching the app. With any luck it will run. If not why not voice that there’s at least yourself who would benefit from a truly universal binary to the game.