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.