Check out this one! It is the Sony Ericsson's PSP mobile phone, designed for PSP game lovers.
The device features a rotating screen. While in the phone mode, you have a simple mobile phone with numeric keypad, menu and function keys. But when you turn the screen around 180 degrees, your menu/functional keys transform into game controls and you have a perfectly good portable gaming device. Isn't it cool? :)
The phone supports all standard PSP games.