Originally posted by another user
All the PS3 games are region free. That means it dosent mater where you bought the console, or where you buy your games, they will all be combatible.
There are a few things to be aware of though.
First the games still exist in PAL, or NTSC versions. That means if your are using and older TV wich does not have HDMI, some games will not work correct, you may expirience weird colors, or black white screen or other odd things. If you use a new TV with HDMI there is nothing to worry about. since when using HDMI signals there is no suchs things as PAL, or NTSC.
Second. if you import a game from another region. You must also buy eventual DLC from the store wich your original game is linked with.
Third. Some games have region locked online play. wich means if you import a US game, you will only be able to play online with other people who have the US version.
Fourth. The bluray movies are still region locked. So you cant import US movies to watch on your EU PS3 unless the movie it self is region free.