Gotham City Impostors
Developed by Monolith Productions, Gotham City Impostors came out on February 2012, but turned to F2P in late August of the same year. Not typical of Batman franchise titles, GCI is actually an FPS in which the player characters are heavily customizable people dressed as Batman or his archenemy, the Joker. The weapons are generally unconventional and rather interesting, fitting the makeshift design of the game, as well as the ramshackle portrayals of the heroes.
It’s rather tactical and mighty fun, so I’ll just leave this Jack-in-the-box which is totally not a bomb right here.