A vibrant, stylized icon representing in-game challenges, featuring a circular design with a bold, outer ring that glows with a gradient of Overwatch's signature colors (blue to orange). The center showcases a dynamic, angular star motif, symbolizing achievement, with subtle holographic effects to give it a high-tech feel. The icon's surface is smooth with a glossy finish, making it stand out in the UI with its luminous and reflective properties.