I keep a prepaid SIM in an old iPhone 4 as an emergency backup phone so I'm not SOL if I lose my phone because I don't have a landline at home. Every now and then I check on it to make sure it's still working and always end up playing a few rounds of Flight Control when I do.
Companies should consider when they can open source things like this to let greatness live on, if they won't find a way to support it directly.
https://en.wikipedia.org/wiki/Flight_Control_(video_game)