Knuckles' Treasure Hunt is an LCD game distributed by the McDonald's chain of fast food restaurants.
They were offered as a part of Happy Meals for a limited time in 2004. The game featured two emerald-shaped buttons used to control Knuckles. The game's objective is to move Knuckles around a field collecting Chaos Emeralds. The field consists of six platforms that feature randomly appearing Chaos Emeralds, along with two moving platforms to take the player to higher and lower levels. After Knuckles collects a set number of Chaos Emeralds, the game ends.