[2][3] A cooperative, PvE companion game Guns of Icarus Alliance was released on March 31, 2017.

[4] On December 23, 2011, Muse Games launched a Kickstarter project to raise $10,000 to partially fund the development of Guns of Icarus Online, and the company subsequently received $35,237 at the close of the bidding on February 21, 2012.

[5] Following the completion of their fundraising campaign, Muse Games co-developer Eric Chung announced that Guns of Icarus Online would enter closed beta on April 10, 2012.

[8] Guns of Icarus Online is a steampunk/dieselpunk, multiplayer, first-person shooter that focuses on airship combat.

Players can choose three different classes: gunner, engineer or pilot, which allow them access to different kinds of tools.