Loved XCOM: Enemy Unknown? Finished the Campaign wishing there were more? Want a reason to play through it all over again? It seems that Firaxis has made good on its promises for Second Wave, the downloadable "mod" for the XCOM campaign - promising a variety of campaign mutators that would wholly change how the game is to be played. After the unexpected disappointment that was Firaxis' Slingshot DLC, it seems the appetite of XCOM fans have been sharpened, and Firaxis itself is determined not to disappoint. As to quote its lead designer, what people wanted "was more elements in the system." As such, Second Wave promises interesting new mechanics that would alter entirely the way the game is played.