A rich, well-developed world and atmosphere that alone is worth the price of admission with challenging combat that far too often veers into frustration. Unlike most shooters where ammo is around every corner, in the world of Metro ammo is a precious resource to the point where higher-quality rounds are a literal currency. While it’s an interesting system, the scarcity is so extreme that it’s possible to soft-lock yourself from completing certain combat encounters, forcing you to reload an earlier save. In my play through I ran out of ammo fighting a boss and since there were no other means of damaging it, I had to load an earlier save and turn down the difficulty just so I could collect enough ammo to defeat the boss.