Steam has a "Shmup Sale" on just now, but you'd never know it considering the variety of genres they've stuffed in there.
As such, here's a list of games I think are cool and are on sale should you wish to dodge the pink bullets. I'm more of a survival player than a score chaser, so that might influence things a wee bit. Sorry if your fav isn't on the list! That might be because it's not on sale (Like Drainus [https://store.steampowered.com/app/1975360/DRAINUS/] or kaikan [https://store.steampowered.com/app/2558570/KAIKAN/]) or I've just not played them.
I've broken them down into intro games, more difficult ones, and some older/classic titles at the end.
Have fun~
Bumping this with some demo suggestions from Scottish(!) shmup devs!
Birdcage - A modern homage to Treasure's classic Radiant Silvergun. It's '90's as hell, with music by Barry Topping of Paradise Killer/Thatcher's Techbase/Epoch fame. https://store.steampowered.com/app/2158550/BIRDCAGE/
ZOE Begone! - A take on the Fantasy Zone style, very a really nice overall aesthetic and ios geniunely so good to play. Been watching the dev develop this over the past few years and him showing it off at local meet ups, so really hope that people pick it up! https://store.steampowered.com/app/1266610/ZOE_Begone/

