In modern day Earth, the world is moving on from a rather traumatic event. Unfortunately attempts to discover the origins of the "Dusting" unleashed a great evil. Thankfully the evil came with some much needed help but can the two Earth's greatest protectors stop the threat of the Irkens. Spinoff of Michael Weyer's Infinity Crisis saga.

After their victory over the aliens, Captain Fleming and the rest of S.T.E.A.M. attempt to pay Robin a visit, but the attempt to reach him didn't go as planned...Meanwhile, Corrin struggles to end the conflict between Hoshido and Nohr. Fortunately S.T.E.A.M. is with him on the job. And they aren't the only ones from another world to aid him. (Cover images from Sprites Resource)

Robin and his friends now confront the strongest enemy they have ever faced. The fell dragon Grima. But Robin's bounds with the Shepherds might not be enough to defeat him. However his world is not the only one his invisible ties connect to. Takes place after Code Name F.E. and during the final battle of Fire Emblem Awakening.

What if the amiibos were more than playable characters? The story of Code Name STEAM with the Fire Emblem characters taking part in the plot. Aliens have attacked the earth. Four worriers from another world have been trapped in the chaos. Will Henry Fleming and his friends be able to eliminate the alien menace? (Complete!)

Just over a decade after joining the Union, California comes to discuss her life with America, primarily her former identity as Califia, Queen of the Island of California - an island that does not exist and never has. (A Hetalia / Code Name: S.T.E.A.M. crossover)

Along with a human visitor, the main Six of Equestria, along with Spike and Starliht, are accidentally sucked into the world of Codename S.T.E.A.M. Now, they must unite with the agents of S.T.E.A.M in order to prevent a massive alien invasion and get back home.