Ok...I need help.
It's regarding L4D2(obviously)

When I try to enter game it says "could not load library client", and then game crashes. Didn't have this error so far, got it when updated to 2.0.0.9 version. It worked fine, then suddenly last night i got one crash to desktop, and wasn't able to get back in game.

Any help?
Reinstaling a game is not a solution, I don't have instalation folder of l4d2

try to reapply the patch,i guess its something with client.dll

Had the same issue, I downloaded stryder's from http://cs.rin.ru/forum/viewtopic.php?f=29&t=54529 and re-applied. Worked.

Thanks guys, but nothing worked. Downloading new clean files. Tried everything.
Anyhow, if anyone has problems, feel free to post here

I had Razor 1911 release + Stryder patch.

Obviously,
only possible solution is reinstaling the game, but still i don't know what went wrong there.

Edit: Now it will took me 2 days to download damnit, I somehow got stucked at 71%

Sure you replaced the stryder client.dll with the other one?

Downloaded game again, but this time Im holding onto bin folder backup.
Thanks guys! (for trying to help)

I always use loader.stryder crack with all updates and i never had problems

Well neither did I until this 2.0.0.9 update

Heres how i installed and played L4D2 with no crash

1. Clean install Left 4 Dead 2 - Pirategay Edition.

2. Apply the Full 2.0.0.9 Patch. LINK -- http://www.mediafire.com/file/5zvizoezzmf/L4D2_Full_Update_2009_sn.exe

3. Apply the L4D2_Rev_Emu_9.81R4_SN. LINK -- http://www.mediafire.com/file/rqkkw1u2r1t/L4D2_Rev_Emu_9.81R4_SN.exe

4. go to your Left4Dead 2 folder and run left4dead2.exe

5. Play hard and Enjoy!