When in eastern black mez, you will give gravel and you play out with a dog, take a ball with me in Ravenholm and experiment with him there. Very easy passage. You can also take with you the automatic machine gun in the “Drug” chapter after Alex reprograms the “interface” and you shoot at the dispatching post, until Alex is suitable. Very help on when the enemies will be filled from four sides, and the machine guns will give you only three. By the way, you can barricate one, and if it turns out, then two entrances in this place, before climbing the stairs and jump into “hell”.