anyway to put more games on ipod nano???

You can download games from this site, which are played through the iPod's Notes feature.

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I would say search google, yahoo, msn, and maybe macforums.
Also search the for iPod sites, then search those.
I'll keep my eye out and tell you if I see any!

There's only an unsafe way ... at the time.

I saw some people able to play doom on them ipod nano, and play video too. For that you got to setup ipodLinux.

I didn't tried because Apple doesn't support this (and I don't know if my waranty will get off), but if you want so much to play new games try it out.

I had a 4th gen 20gb with ipod linux and it just locked up one day.
It wouldn't responedat all, Apple fixed it, but just like music they didn't put linux back on. They never said that it would void the warranty.

Now my friend had a problem with an ipod that he had changed icons with alteripod. Apple wouldn't work on his iPod because he had altered there firmeware, they said it was his fault and there for it was not covered by warranty.

Unless you are prepared to hack your nano with Linux, the answer to your question is no.