Shootem up of Madness - No Promises

The Shoot em Up of Madness 

Sussus is trying to combine the multiverse into one, harnessing its power, causing the multiverse to collapse and merge into one another. Different versions of you came in from the branches to stop Sussus in your timeline. Change your ships on a whim to different versions of you to combat the enemies with different weaknesses, kill the boss,  party with you and other-selves.