The shirt, available in men and women's sizes for $24.99, is emblazoned with the phrase "That Wizard Came from the Moon" — a reference to a line spoken by Game of Thrones actor Peter Dinklage. The phrase began spreading among players and press after the game's alpha went live earlier this month. Bungie said that it took only one hour for the shirt to skyrocket into popularity.
According to Bungie's website, the limited-edition shirt is a way to commemorate players' time with the alpha. All profits from the shirt will be donated to charity from the Bungie Foundation.
The Destiny alpha gave players a chance to test out the game's classes and get a feel for its world. A beta is expected next month.
For more on Destiny, check out our in-depth preview from E3 2014.