Working combat system !

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While a full conversion may be required for changing lamp models, you would also need a full conversion if you plan to use oil as ammo. This to prevent oil loss by having the "gun" out. Using oil as ammo is not a dumb idea; in fact, it makes the scripting a lot easier since the game would be keeping track of "ammo" for you, therefore you won't need to implement an ammo system in the script. While one may have a limited inventory space, so do many first person shooters of the horror genre. They have that for a reason, to try and make it more of a survival horror game. However, this doesn't prevent anyone from making a chest which the player can store items in.