Those games are readily available. Rockstar thought it would be funny to release a Definitive Edition of the GTA Trilogy and take the older versions off of stores.
BE CAREFULL !
Do not download games from Dilmak Games ( Iunfunny's website )
They have hidden malwares and trojan horses, I checked them in Virustotal
I don't know if he does it with intention
Just don't download if you don't want hackers mining bitcoins on your PC; CS : GO