Alien Bosses are extremely powerful alien ships, against which the player can fight in the game of Astro Lords: Oort Cloud.
If the Astro Lord wins a fight against the Alien Boss, they get a lot of credits or tritium as well as many experience points for their Captain.
In the confirmation window, the player can see the Alien Boss's level, HP and also what they will get if they win.
High level Bosses use unique ammunition, they also possess a high skill of volley fire.
In the Oort Cloud, the player can find Boss Challenge Cards that they can use at the Arena.
To do that, the player needs to hit a green "+" there.