Croteam has thought of a brilliant, and bloody, way to protect Serious Sam 3: BFE against pirates. Unlike most games that require key codes, online validation, or secure-ROM, SS3 unleashes an immortal pink scorpion on those who pirate the game. If you decide to illegally download the game you'll be chased by this baddie forever.
This might be the most effective action against video game piracy we've ever seen. Cheers to Croteam, this really makes my day.
Source: DSO Gaming