My brother has started playing Metro 2033 and is stuck in Dead City. His gas mask keeps running out. He found out that he can stock up on filters/masks in the market so that's what he's going to do, but what I need help in is in this youtube video:
I think it will start playing at the correct time, but if it doesn't it's at 3:49. What is that he brings out? is it something to do with filters? So a) I need to know what it is, and b) how do you bring it out, cos my brother has tried everything but can't seem to get it out like in the video.
Thanks for your help:)