Insomniac's Fuse began as Overstrike, a colorful co-op spy game with a humorous flair. Fuse continues the co-op direction of the game, but has shifted its look to a style that tilts more toward realism than fantasy.

Some internet reaction has labeled the new style powering Fuse as just another 'standard military shooter,' but Insomniac says it's not totally shunning the game's fantastical elements.

"We have our underwater bases. We've got missiles and volcanoes. We have a lot of exotic situations but at the same time we want people to take the universe seriously," Insomniac Creative Director Brian Allgeier told Joystiq at the 2012 New York Comic Con.

But over-the-top elements still exist in the more mature-looking multiplatform game, as evidenced by the game's weapons and abilities.