Microsoft faced challenges during the launch of the Microsoft Entertainment Pack, particularly regarding the packaging and licensing of Tetris. Due to ongoing negotiations for the licensing rights, the initial packaging did not include any reference to Tetris, leading to the decision to use a bright red sticker stating "Now Includes TETRIS for Windows!" once the licensing agreement was secured just before the product launch. This last-minute addition transformed the marketing approach into a success, and the product was later branded as Microsoft Entertainment Pack 1. The stickered version of the pack has since become a sought-after collectible.