No, it's not the final movie in the series, but it's the end of a particular era for Jason, and it's a good way to go out for the hockey masked killer.
Jeremiah KippSlant Magazine
Even though we would see more of Jason over the years (first as a zombie, then battling a telekinetic super-girl, taking on Freddy Krueger within his own warped dreams, even hacking teens to bits in outer space), this one certainly felt as if it properly closed out the Friday the 13th series before it devolved into unadulterated camp.
Jay ScottThe Globe and Mail (Toronto)
The appeal of the Friday the 13th cycle is difficult for any one who has not seen the movies on a Saturday night in a packed theatre to understand: they are an exercise in collective adolescent camp. As each victim falls to Jason's wrath, the kids cheer and laugh, and the gorier the death, the better. By the standards of that audience, part four is perfection: there are more gruesome homicides than Pauline had perils. [17 Apr 1984]