Since the sale-tracking site dekudeals.com lets you make custom lists, I couldn't resist painstakingly going through this thread to try to put all of these titles in one place for myself. Thought I'd share it here to those who might find it useful
https://www.dekudeals.com/lists/h9wbjf
I should mention for the purposes of this list, I don't really have a well-formed definition of "shmup", and I put a number of titles not mentioned in this thread, based mostly on screenshots & description (plenty trash, I'm sure). Making no promises to keep it updated!
