HL2, HL2 Ep1, CS: S, HL2 Ep2 wont work, help plz

[omg]

when i go to open half life 2, half life 2 episode one or counter strike source on my computer i get a message saying

Error!
Unable to load crogram files\steam\steamapps\[game name]\bin\filesystem_steam.dll

when i run HL2 Ep2 it works. Why? And why wont my other games work, i am new to steam and want to play my games can someone plz help me.

 

[Vaun]

Errors like this are becomming common, i havent had them yet, but i dont play css much and i usually play SMOD remastered redux instead of vanilla hl2.

 

[SamuraiKenji]

If it's pirate we can't help

 

[Calhoun]

Do you have a Steam account?

 

[Cavalry]

Hi omg,

First off, are the games obtained legally, or did you pirate them?
If their pirated, they wont work and you'll need to actually buy them. With money. Off of the Steam store or your local game shop.

If they are legal, make sure you've activated them all.

 

[omg]

ya they are obtained legally, i bought the orange box then bought CS: S so i could play Gmod (all in same day before i even installed) never played any of them and the only working orange box games were Portal and Episode 2 which i dont wanna play till i play original and episode one

and yes i have an account

and i was actually under the impression that it was impossible to pirate steam software as you have to activate it to an account.....