Serious Sam Double D

Serious Sam Double D is a side-scrolling shooter developed as part of the Serious Sam indie-series. The developing studio kept on working on the game and in 2013, the game was released as Serious Sam Double D XXL for Xbox 360 on the Xbox Live Arcade, integrating more weapons, more enemies, and the long-awaited co-op mode. Serious Sam Double D XXL was released as a free patch for the original Serious Sam Double D for Microsoft Windows. (wikipedia.org)