Let me guess, you've got a http://www.gamesas.com/topic/1531166-galaxy-tab-2-meets-requirments-but-marked-as-incompatible/?
To be fair, given how unstable it was on the iPhone 4S with 512MB Ram, you'd be up against it to run it on anything but a decent 18-24month old Device, it's been reported to crash even on iPhone5s because it uses up so much RAM. Luckily, not a hint of an issue on my Samsung S6, but its got loads of RAM, which no doubt helps.
Seriously? What model number is the one that works? If you go into Settings and About Device, there should be a model number. My Tab 2 is a GT-P3113, and FOS won't even install.
Right, but it's mostly happening with Galaxy Tabs. It makes me think that there is something going on with these specific models. So if your sister has a Tab 2 GT-P3113 running 4.1.2 and the game works, wile we both have Tab 2 GT-P3113s with 4.2.2 and the game doesn't work, then maybe there's a driver or app that Samsung borked up with the 4.2.2 update. That's the reason I was interested in your device models.