Steambirds: Alliance is a MMO shoot-'em-up in the spirit of Realm of the Mad God (a game that Spry Fox helped to develop some years ago). Gameplay is cooperative and in real-time, as opposed to the single-player, turn-based nature of previous Steambirds titles.
Steambirds: Alliance released on August 22, 2019. You can get the game for free from Steam here: https://store.steampowered.com/app/386010/Steambirds_Alliance/ . The game is free to play, with optional in-app purchases if you so choose.