Simon the Sorcerer 4: Chaos Happens is set some years after Simon's last adventure in the Magic World.
One day when Simon is fighting with his younger brother over the TV remote, he is knocked out and receives a vision. In the vision he sees Alix, a friend from the Magic World, that tells him a doppelgänger of Simon is causing trouble in Magic World. When Simon awakes, he doesn't know if the vision was real or not. Nevertheless, he enters his magical wardrobe and travels to the Magic World determined to find out.
Simon the Sorcerer 4 is a traditional point-and-click adventure game. The player is mainly tasked with solving logical puzzles.
A new feature is the in-game hint system and journal. The journal keep tracks of every situation that needs to be solved; for example: "How to get past the bridge troll". Each journal entry is marked with 3 stars. Each star will reveal a hint on how to solve the puzzle. By pressing "H" every interactive object on the screen will be highlighted.