I have not played RE0, REmake, or CXV. But there were deffinately scarier areas, enemies, and moments throughout the series. RE2 was pretty damn scary. RE3 not as much. But the early games mostly just had parts that made you jump. Like a licker or Nemesis bursting through the window or something. I thought RE4 was pretty scary at times too. But it was a different kind of scary. Not only were the enemies and areas creepy but the music sometimes made you kind of tense. Especially in that castle. Most of the time it was an "OMFG that f*ckin thing is gonna kill me!" kind of scary. But I never felt like that while playing RE5. Maybe it was because I had my bro there to back me up but it was deffinatley not as scary as the previous games.