I strongly advise using Steam or another official retailer to ensure your computer remains secure and you can enjoy the full 4-player cooperative experience without technical issues.
While users often search for torrents to avoid costs, downloading from unofficial sites carries significant risks: Strange Brigade Torrent na stiahnutie
If the price is the main concern, you can use price tracking sites like IsThereAnyDeal to find authorized resellers (like Humble Store or Fanatical) where the game is frequently discounted by up to 90%, often making it cheaper than a lunch. I strongly advise using Steam or another official