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Not all games have support for all devices. It isn't unusual for new products to be "left off the list" if you will. Just wanted to get a basic feel for game availability.
Bought one last night (despite Best Buy's best efforts to not make a sale) and loaded a couple for an upcoming business trip.
As you said, "MC4" loaded fine.
"Horn" also loaded and runs (a lot of people have had compatibility issues with that one.)