Steambirds Alliance is a free-to-play massively-cooperative bullet-hell shooter by Spry Fox LLC released in 2019. Fly with dozens of friends in an open world full of cruel bosses and endless cascades of deadly bullets. We’ve got a big main world, hundreds of unique enemies, a wide variety of secret missions, and many distinct plane types for you to unlock and master. But fair warning: Steambirds Alliance is a permadeath game – when your plane is shot down, it will be lost to you forever. (However, your pilot will eject and potentially level up if you’ve fought bravely enough)
Steambirds Alliance is brought to you by Spry Fox, who co-developed Realm of the Mad God, the first-ever MMO shmup, back in 2010. At the time, RotMG was called “the most co-op game ever”, but they fully intend to top that with Steambirds Alliance.