With a name like Fat Chicken, you’d expect a fun and funny game about portly poultry. But while you’ll find that, and more, in this “reverse tower defense game” — which is now available iOS devices, Macs, PCs, and Linux — in talking to Relevant Games’ Randy Greenback, the game’s senior creative director, it seems there’s a deeper message to this game…and no, it’s not about why you shouldn’t fat shame farm animals.