Not all horror video games are created equally. Some focus on creating an atmosphere of isolation and vulnerability. Others rely on shock to frighten the player, while making sure there's enough firepower laying around to shoot horror right in the face. Confused? Perhaps this handy graphic will help.
It's the difference between Resident Evil 3 and Resident Evil 4, or Ridley Scott's Alien and its action-packed sequel, Aliens. For many it's an incredibly subtle distinction, while for other's it's the difference between wet and dry pants. If you're having trouble telling one from another you're a more stalwart person than I, and you could probably benefit from this handy chart that's making the Reddit rounds.