For me, all the previous games except Perseus Mandate were awesome.
Perseus Mandate still isn't as bad as Duke Nukem Forever. They just over-used the formula of the F.E.A.R. games before it that bowled me over.
FEAR 1 was...fresh..original...to be honest..that's what captivated me. was a bit scary too. after that...it just failed to keep it original for no fault off the game-play ofcourse.