Is TPS region locked on ps3

Hi guys, just a quick question about TPS on ps3. I have read that it is region locked on steam PC but wondered if it is the same for PS3?

My girlfriend is russian and we want to play TPS together ( i am in England) but i am worried she will buy and we wont be able to play.

Any infomation on this is greatly appretiated.

Thanks very much

Oops put this in wrong place.