No, not guts. That's not a typo. This guy constructed an entire Far Cry 4 level—and an elaborate one, at that—for the sole purpose of rampant goat slaughter.
It's not quite as despicable as it sounds. Robbaz plays it off as though he's some kind of top-secret anti-goat operative stealthing his way through the most sinister of Himalayan terrorist goat lairs. He used Far Cry 4's map editor to create a snaking series of setpieces not unlike what you'd find in a traditional first-person shooter. Towers, offices, and even an overwrought, high-flying escape sequence. They're just overrun with, you know, goats instead of soldiers.
It's pretty silly. Check it out.