Infamous 18, to recap, was a golf game from 2006 that puts you on a series of infamous golf holes that previously only existed in paintings, done in the 80s by golfer/artist Loyal H. "Bud" Chapman. The Grand Canyon, Castle Neuschwanstein, even the rooftops of Wall St., are all playable here.
I got a copy of Infamous 18 from eBay back in July, and on finding that the internet had no info about it, put it on Internet Archive and also uploaded a no-commentary play through: https://www.youtube.com/watch?v=O_yKYO3mpmU