Why iphone 3G games suddenly stopped working, the app open and closes instantly?

Hi
I noticed from last 2 weeks that my iphone 3G games which used to work perfectly fine suddenly stopped working. Whenever I try to open a game, it opens for a split second and closes immediately. I even tried rebooting my iphone several times but that didn't help. Please advise if you have any pointers.

It could be that the games require extra RAM or processing power which the aging iPhone 3G does not provide. For a temporary fix, shut down the phone, then restart it and launch the malfunctioning apps again.

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