Here in the UK at least, when you buy the PSP Go, you get 10 full free games with it. How you download them, I'm not sure, it probably comes with some kind of voucher.
You can download psp games on your PlayStation Network.The Demo's are free but full games, you have to pay but not alot, to pay you can use redeem cards. Where you can get them at Walmart and Target etc.
From the PSP's main menu bar, you can access the PlayStation Network, you can purchase and download full games from there.
Full PSP games can be downloaded from the PlayStation Network store. The PlayStation Network store is accessible via one's PSP where full PSP games are available for purchase and download.
you dont
Yes, you can.
Unless there's some kind of special offer, usually not.
Download All Type Of PSP GAMES from here Just for free: http://afeef432.webnode.com/psp-games/
No, you don't need to use a computer. You can connect the PSP straight to the PSN, and download games directly.
One can find free downloads of PSP games from pspshare and pspube. One can find and watch hundreds of free PSP games from Youtube and download from there.
In the playstation store
You can get full games in the PlayStation Network (psn) store
some of them are free to download like demos.