The ATK Harri package is an item that appears on the loading dock outside of Teimo's Shop once the order for the mikropekka computer has been paid at the shop counter; the package takes a bit over two hours of real time to arrive after dropping the envelope. The box contains the four parts of the computer: the case, monitor, keyboard & mouse, and speakers.

The package can be moved around just like any other item, and it can be opened by pressing F. The cardboard wrapping will then automatically despawn after a few seconds. The package also opens automatically upon saving and reloading the game.