I'd forgotten all about these, but I had quite a few on my old iPod U2 Special Edition. They were actually very good. I played the hell out of Apple's Texas Hold-Em game. It's certainly odd that they're still referenced in the iPod Classic promotional material, since Apple removed them over three years ago.
Reading Simon Jary’s delightfully snark-filled 10 reasons Apple will and won’t kill the iPod – is the iPod really doomed? on Macworld UK this morning, I was reminded that the iPod classic had, for a while, games. They were pretty simplistic, but they worked. I recall buying a couple of them, and they got lost somewhere between one old Mac and my current computer.