Multiplayer shoot em up games with 4-player local/couch support

I Got Isekai'd Into a Shmup

Players: 0 local, 0 online

Astrosmash

Players: 4 local, 0 online

Astrosmash

Players: 4 local, 0 online

The Art Of Flight

Players: 0 local, 0 online

Operius DX

Players: 0 local, 0 online

Operius DX

Players: 0 local, 0 online

The best multiplayer shoot em up games with 4-player local/couch support, including I Got Isekai'd Into a Shmup, Astrosmash, Astrosmash. See if the games support online, couch, and split-screen play, whether the game has a cooperative campaign or separate multiplayer modes. Find out the number of players supported and check out ratings of multiplayer games.