Unknown is the final boss enemy for the 2D section, Descent with Modification in Space Invaders Infinity Gene. It is made up of many entity's and has four forms. Its first form is when lines come out the bottom and end in squares, like Jolyne. In its second form make rotating squares appears and shoots a laser connecting to them, after it hits the final one it will target the player, after doing the same cycle twice it will then go around the screen shooting projectiles at the ship. In its third form it will rotate around the screen and shoot projectiles all around itself. Its final form will make a giant ball of energy which will be shoot at the player's ship, the player will need to shoot at it to send it back and defeat Unknown.