How to unlock dodo invaders in learn to fly 3

Question

I am playing learn to fly 3 on steam and there is an achievement called :

Old School Fun, Not So Fun

its description is this :

Beat the highscore at Dodo Invaders

I don't know what is Dodo Invaders and how to unlock it. I have search on the internet but nothing. Thank you.

Answer 1

Dodo Invaders is a game you can play in the black market.

Easter egg type minigame in the black market if you point your mouse all the way to the right of the screen and click the arcade machine you will start playing dodo invaders[...].

Source on Kongregate, down the first page.