 
<translate> Ahịrịokwu dị mkpa na akụkụ ahụ bụ: Igwe IW bụ igwe egwuregwu nke Infinity Ward, Treyarch, na Sledgehammer Games mepụtara maka usoro oku nke ọrụ. Ya mere, azịza ikpeazụ bụ IW engine. <eng> The relevant sentence in the passage is: The IW engine is a game engine developed by Infinity Ward, Treyarch, and Sledgehammer Games for the Call of Duty series. Therefore, the final answer is The IW engine. 