Currently Being ModeratedJul 15, 2013 12:29 AM (in response to bobocookiemonsta12)
There are actually a lot of apps and games which are compatible with your iPod Touch 2g which runs iOS 4.2.1. You just need a tool to separate them from the incompatible apps.
Here is my favorite solution:
iOSSearch - search the iTunes store for compatible apps.
And here are some things other people have suggested:
Vintapps 3.1.3 - paid app.
Apple Club - filter apps by iOS version.