Serious Sam Classics: Revolution is a unified version of the Croteam's original Serious Sam Classic: The First Encounter and Serious Sam Classic: The Second Encounter experiences. The game started to be redesigned by Alligator Pit, an indie development team made of Serious Sam fans with support from Croteam, but it was “on ice” for a while due to life happening to Alligator Pit team, so recently Croteam took over the EA development and made it to the finish