Glen Schofield, general manager Call of Duty: Modern Warfare 3 co-developer Sledgehammer Games, has defended the series’ aging engine against detractors who claim it’s beginning to look dated.

Speaking with CVG, Schofield described the six-year-old Infinity Ward engine as a “Porsche”, adding, “it is stream-lined, everything in it is perfectly freaking clean. You can tell it's been worked on for years. It's easy to upgrade.

“We worked with engines before that are like f**king spaghetti. You can't work on a part and put it back in without messing with everything else. Modern Warfare 3's levels now are so much bigger than the old ones because they go more vertically, they have a bigger footprint and on top of that, higher fidelity, more textures and a lot more detail.”

Schofield pointed out that the engine sees constant upgrades, and rounded on commentators and journalists who say otherwise.

“Look at all the character models, look at all the gun models, look at the reflections, look at the water. There is so much that we've added, so when someone says 'cut and paste', I don't even want to talk to them because they don't know. They just don't know. They have no idea.”

Call of Duty: Modern Warfare 3 will be released on the 8th of November for PC, Xbox 360 and PlayStation 3.