Fallout 4 comes with lots of hidden extras, one is the mini games that you find on game tapes and can be played on terminals or via your pip boy 3000.
They look very similar to classic arcade titles from years past as well.
In fact with the games found so far we've seen the comparisons
Red Menace is actually a Donkey Kong clone
Atomic Command is pretty much Missile Command
Pipfall is atari classic Pitfall
Grognak & The Ruby Ruins is A Bard's Tale
and Zeta Invaders is a really fun Space Invaders
The Game.. in a game.. inside another game.. Fallout 4 keeps delivering.
It's why we gave it a 5 out of 5