Counterstrike Source Help

I downloaded the CS:S non steam client. i patched it up and everything. i can play it after a fresh install but once i leave the game and try to go back and play online it says “STEAM valiadition required”. any one kno wat thats all about?
Answer #1
Moving to Correct Section; Please post in the appropriate section next time.
All topics need to be opened in their respective sections/catagories. Please look before posting.
-
Answer #2
Are you trying to play Online of Offline?
Edit: the version of css you downloaded is probably only for offline or lan play.
Answer #3
well im sure you have ti have steam to play online
and WELCOME TO THE FORUM
Answer #4
It is near to impossible to play pirated steam games on a legit steam client.
Just buy the game