Zeta Invaders (Fallout 4)

Zeta Invaders is a Pip-Boy game tape

Gameplay
Selectable as a playable game on the Pip-Boy 3000 Mark IV, on the Inventory, Misc tab. The player must destroy all the Zetan alien ships before they reach the ground.

Location
The tape can be found on a desk, inside the Valentine Detective Agency located in Diamond City Market.

Behind the scenes
The title and game play are a reference to the 1978 arcade game Space Invaders.