First of all, you will need to go to a PSP download site. The one which more people are joining up to today is called PSP Blender. However, there are a few other sites on the net. But this is by far the easiest to use.
Once you are a member of a site like PSP Blender, you will get free PSP game downloads whenever you want. If you know what you're looking for, then you can go to step 2 now. Otherwise, if you want to know more about a game, you can read a review of the title by going to Game Reviews options.
Here's what a review of Ratchet and Clank looks like. Check out the release date.
If you have decided what PSP game you want to download, then you will need to do a search. You could say it's like searching for something on Google. Anyway, the site is broken down into games, music, software, movies, wallpapers ect.
You will have to download the title to your computer.
After a couple of minutes, the game will be transferred to a file on your desktop. Now it's time to transfer the file to your PSP. All you need to do is get your PSP and plug in your USB cord from your PC, to your PSP.
You are ready to start playing! It's that easy!