There are different types of free downloads available on the internet
. Often times third party companies will develop software for use on devices such as the PSP. This is why it is possible to download free psp games either onto your psps memory card of the internal memory built in to the newer PSP Go models. It is important to understand the difference in psp systems so you'll known what to look for.
There are actually many different models of the psp gaming system. The original was called the PSP 1000. It was later replaced by a slim system that had a slightly better screen resolution. The PSP 3000 came after and has the best screen to date.
The 3000 later came on the market and offered the same slim design with a sharper screen. Ratchet & Clank, Star Wars, God of War, and Madden NFL special edition systems were released. They all are either PSP 2000 or 3000 series systems.
The newest types of PSPs on the market are known as the PSP Go. It has a smaller design with a screen that has a piece under that slides out to reveal the buttons. The UMD disc tray was removed in order to make the system more portable. This is why PSP downloads have become so popular. Through playstation's network you can pay (with points or a credit card) to download games. But, what they don't want you to know is that you can download many games from 3rd party websites for free.
If you seek out the right places you will find that free psp games are out there. You have to make sure you look in all the right places. Using the internet instead of relying on Sony's playstation network is one of the best resources you will ever find for free psp games.