Because Modern Warfare is published by Activision, which is a part of the bigger Activision/Blizzard company. So to save money, they just put it out on the Blizzard launcher (Battle . net) instead of having to pay Steam to sell it here and they keep a part of the profits.
"Before 2024, Activision sold digital versions of PC Call of Duty titles on Valve's successful Steam platform. In 2024, Activision decided to take the game off of Steam and make it exclusively available on Battle largely to attract users to, and grow, Activision's own platform. Battle.
That creepy refrain plus Jason's hulking form, hockey mask, and emotionless brutality is why the Friday the 13th franchise is 43 years old, 12 movies deep, and as iconic as Ronald McDonald. And it all explains why you wanna know how to watch the Friday the 13th movies in order.
It is a franchise that many of the generation of Nintendo and VHS saw the sequels before the first film. Upon viewing the original Friday the 13th, xennials were shocked to find that Jason is not the killer. It is his mother, Pamela Voorhees.