The game has seen various updates and iterations over the years, including the version you're referring to: Iron Snout Unblocked 99999 2021. These updates often bring new features, levels, or gameplay mechanics.
Iron Snout is a fast-paced, "bacon-flavored" 2D brawling game where you control a ninja piglet fighting off waves of weapon-wielding wolves iron snout unblocked 99999 2021
A legitimate question for 2021 searchers: Are these sites safe? The game has seen various updates and iterations