 Croteam took their publishing rights from 2K Games to new startup Devolver Digital, after 2K Games became uninterested in "Serious Sam", waiting for their long rival "Duke Nukem Forever" to finish.Both episodes were remade using Serious Engine 3 featuring updated visuals, better performance and lush environments, all in high-definition.The remakes featured 16-player online co-op (4-player in the Xbox Live Arcade version), deathmatch and a new game-mode called "Co-Op Tournament".