The development team at Croteam has a weird, funny DRM scheme for their manic shooter Serious Sam 3: BFE in which a giant, super-fast pink scorpion which cannot be killed will harass you during the entire game. It’s similar to what Rocksteady did with Batman’s cape in Batman: Arkham Asylum and what FROM Software did in Dark Souls.
That’s right, if you pirate the game, be prepared to get squished. For proof of this pink killer, check out the video below.