I purchased the retail version of CRYSIS2 the market to buy back is a complete boxed.
After installation, enter the serial number of instructions
Prompt before conducting re-enter the multiplayer game
But I try to join the game when prompted in some serial numbers already in use?!
Please give me an explanation!
Or give me a new number!

I had the same message yesterday once... and I also had to re-enter the serial again today, but that was all till now. No other trouble since then.

Eventually it's just a little malfunction with unclosed sessions or something like that... let's see if it happens again...

Hi!

Did you check the news article and sticky in the PC forum?