OK, I found that some of these, like Tetris, simply do not work unless converted to a user app. Others cause TB to hang when I attempt to convert to a user app. Because TB doesn't have the option to convert to User app while restoring, I have to convert on the original phone and make the backup again just to see if that works.
It's kind of disappointing to see this oversight. I mean, if this were a replacement phone after losing or breaking my old phone, what good would my backup have done?!
Anyway, I backed up Tetris from an International/Generic Xperia PLAY ROM (wasn't on original AT&T ROM). It works but it crashes on exit (perhaps it tries to call Timescape specifically or some Gingerbread function that doesn't exist). The Bruce Lee game launches but doesn't scale to fill the screen and doesn't support touch screen controls (can't get past download prompt). I don't think the PSX emulator would work or else PSXperia would be on other platforms, so I didn't even bother with that. As expected, the EA games don't work ("New phone detected") but I haven't experimented with the Android ID thing yet.
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Sony Ericsson Xperia PLAY 4G (R800at) Xperia PLAY (R800x) with Sony Ericsson MBW-150 Bluetooth wristwatch, Parrot SK4000 motorcycle helmet Bluetooth kit, and Looxcie 2 LX2 wearable Bluetooth camera/headset.
HP TouchPad 32GB running Cyanogen Mod 9.