In one of the more quiet moves we’ve seen recently, gamers on Steam were treated to a nice surprise this morning upon signing in. Monolith Productions has released Gotham City Imposters as a free-to-play title on Steam as of today.

No official word has been released regarding the move, but the game has seen a bit of activity this morning. The title is still listed as a paid download for Xbox Live and the Playstation Network, but it’d be rather interesting to see either of the companies embrace this move as well.

Are you checking out Gotham City Imposters on Steam today? Be sure to let us know what you think by leaving us a comment below, or discuss Gotham City Imposters in our forums.