R2 Games already has other free-to-play titles in its portfolio, but City of Steam will be the first using the Unity 3D engine. R2 Games CEO Jared Psigoda stated, "I see a lot of potential in City of Steam. Mechanist Games' approach to making a game is something we're thrilled to be a part of. We want to make sure City of Steam gets the recognition it deserves for being the innovative game that it is."
[Source: Reality Squared Games press release]