This is the continuing journey from where Metro 2033 left off where we once again play as Artyom in the dark, mutant infested tunnels of the Metro. I quite like the story here, as we learn a lot more about our protagonist and the "dark ones" (the main antagonists of the first game). I also very much like the Stealth mechanic too, though those throwing knives seem to be overpowered since the last game (guess Artyom did a lot of pushups during the time gap). Also cool is that people that don't like it can choose a different setting right at the start for a more Actiony experience. I can't comment on that because I obviously didn't pick it.
If going via stealth, don't stand in the light like this dunce.
The graphics are again top notch and both the claustrophobic, poorly lit tunnels and the often misty radioactive surface, which you visit a lot more in this game, are detailed very nicely. New critters are also equal parts cool and scary, especially those light-hating spiders but as I alluded to at the start, if you have played the first Metro, nothing here will really scare you.
The only two things I didn't like about the game are the "checkpoint mechanic" which can happen to save your game just as your air filter is almost empty and you are low on health, and the "view for voice" mechanic where you must actively turn to look at whoever is speaking to get the loudest volume. Maybe Artyom has something wrong with his ears from all that gunfire and grenade blasts in enclosed spaces? Whatever the case, I give this four and a half bullets out of five and recommend it to people that liked the first game, the Thief series, and to those that like shooters in general.