Iggy’s Castle is a SMW hack that falls into the platformer and exploration genre, designed for players who want something darker and more thoughtful than a typical Mario level. Created by Wakana, the game takes place inside a shadowy, horror-inspired castle where progress isn’t about rushing to the goal but paying attention to where you go and what you do. Instead of using the usual exit system, the castle reacts to your choices, leading to more than 20 different endings. Your path, the rooms you explore, and the risks you take all affect how the game ends, which encourages replaying to see new outcomes. Players can jump into Iggy’s Castle fast and easy on kbhgames.com for free, with no installation, playing directly in the browser.