Sub level 13 trophy help

Anyone able to help me out with this one?
Off topic, I recently bought the Orange Box and found people still playing Team Fortress 2 on the PS3, but everytime I try to find a game or open mine up in the Pre-SequeI get bupkis.

I have ps4 And need help too, any chance it could work?

No, if you go to the handsome collection forum you might find someone. There’s no cross platform play.