Guns of Icarus Alliance is provided via Steam key for Windows, Mac, and Linux. For key redemption, a free Steam account is required. DESCRIPTION Guns of Icarus Alliance is the expanded and definitive edition of Muse’s flagship title Guns of Icarus Online, the original player-vs-player steampunk airship combat game. Alliance features all of the content from the original title, but with the addition of player-vs-environment cooperative experiences, an ongoing war between six elite factions vying for control of a world ravaged by machines, and an ever-changing world that is constantly being shaped [.....]