Is it possible to install a torrent game on Steam and play on licensed servers through it?

Question

Steam

Hello. The other day I needed a licensed version of the game cs 1.6 (to play matchmaking on one site). Is it possible to download a portbale or pre-load version of the game, put it in Steam, and have it recognize it as a native (purchased) game. Maybe a stupid question (even a very stupid one), but you never know ...

Answer 1

No.
This is another question "how to save 300 rubles."

Answer 2

You can’t add any third-party game to Steam, unless of course it’s just a license bought somewhere sometime. I once added Kings Bounty: Warrior of North