Game developers, oddly enough, don’t like it when their games get bootlegged. Some turn to draconian DRM—bad for honest owners, meaningless for pirates—but some get MERCILESS.
These developers skip the whole activation code, DRM runtime thing and just start SCREWING with the players. Invincible enemies, gimped abilities, and even… well, just watch the video.
Why? Because it’s not a bug in the game’s code, it’s a bug in their moral code.