If your game is asking for a key even though you own it, or if you're getting errors like "Activation code already in use":
Files with names like this are commonly distributed on: License.key.gta.san.andreas..32884.txt
: Game developers, including Rockstar Games, continually updated their software and security measures to combat piracy and protect their products. The cat-and-mouse game between pirates and developers drove innovation in digital rights management (DRM) and online activation systems. If your game is asking for a key