Super Mario World/Chocolate Island



Chocolate Island is the sixth world in Super Mario World and one of the longest. Most levels, including the fortress, need to be beaten if you wish to encounter the boss ...except if you manage to find the secret exit in Chocolate Island 2, which takes you on a shorter path directly to the castle and skips most of the levels.

In any case, as the end of the game is closing in, difficulty rises considerably, and new enemies and puzzles make life hard here. Again, finding the secret exits is required to get through this world.