Game modifications are a time-honored PC tradition. The very best mods can breathe new life into a game by, say, amping up the graphics years after the game released, or patching bugs the developers never got around to fixing. Sometimes they even add entire campaigns or separate game modes. Witness the original Dota mod for Warcraft III, or the way DayZ's zombies and post-apocalyptic survival completely reimagined ARMA II.

And then there are the weird mods—the "I can't believe someone made this. What kind of person thinks up this kind of stuff?" mods. The wacky, surreal stuff that was made simply to blow your mind. What do Randy Savage, the Kool-Aid Man, and Flappy Bird all have in common? Keep reading to find out.