BABYLON'S FALL is now available on Steam, offering a co-op action/RPG for Windows from developer PlatinumGames and publisher Square Enix. Here's a Combat 101 Trailer to help players learn when to hack and when to slash. For those who pick this up, the official website has details on Season One: The Eternal Ziggurat, which is now underway (despite the name, it will indeed conclude at the end of May). Here's some babble:
After the Babylonians perished, only their great tower “The Ziggurat” remained. Now a new empire has come to pillage its ruins and uncover its fabled treasures. Join forces with other Sentinels, unwilling subjects forcibly implanted with Gideon Coffin, relics that grant the few survivors unrivalled powers.

Choose your playstyle from multiple, varied weapon-types, each with their own distinct skills and abilities. Customize your loadout to wield up to 4 weapons at any time.
Explore a rich fantasy setting that draws inspiration from medieval oil paintings.