This game going to have weapons or any nature of combat?

[Googolplex]

Weapons are not generally a bad thing. They should take place in a RPG or in Adventures like Indiana Jones or Tomb Raider. Also a horror game can have weapons when its well implemented like Penumbra Overture or the old Silent Hill.
But we learned that a game will get more tense when being helpless and "enemies" have more impact when they can not be killed. A good game also has its focus on the story, atmosphere and immersion and not the fun factor. A true horror game never should be about fun gameplay. We are not superman we are just a normal person and this is one of the aspects for a well designed game. To be decent and not what the mainstream wants: just an other Call of Duty with Zombies on Mars.