This title has exceptional graphics, good play control, and innovations up the yin yang. It would be perfect but for one fatal flaw. This game is a straight line. You start from A, move to B, move to C, move to D. There is little to explore, and basically every level is a series of straight hallways. I was hoping to explore post nuke Moscow, but instead went preciecly where I was expected and did preciecly what everyone else did when they got to that spot in the game.
Playing and beating Metro 2033 will properly introduce you to the metro. It might not be necessary but I would suggest it for the story and gameplay so you are not completely lost.
As a sequel, Last Light did an amazing job remastering and improving the strengths and weaknesses of the first game. Tighter gunplay, good story line, good atmosphere.
The linear campaign is made up of traveling through the metro fighting Nazis, Commies, and mutants. But if you don't want to fight you can always take a stealthy approach through the levels. Though shooting or sneaking is fun, both have some weakness in the mechanics. If you prefer sneaking around, you'll find it easy enough to sneak past the most oblivious of enemies with linear "patrol" patterns and seeing the most convenient enemies standing towards a wall alone in an empty room just asking to be knocked out and looted. While shooting one of many customizable guns you may choose from by purchasing or looting, ammo is a pretty scarce thing in the metro, only being able to loot a few bullets at a time from each dead enemy (Playing on normal difficulty I ran out of ammo quite often). Though in this game the explorer is always rewarded with extra ammo by checking store rooms and nooks and crannies for extra supplies and ammo.
The story is by far astounding in today's standards of story telling in video games, mixed with amazing graphics and the best atmosphere I have seen in any game like this, it feels as though Dmitry Glukhovsky (the author of the metro novels the game is based from) had no problem translating the book into an interactive medium. The game also has decent pacing in the story, though at times it will feel like you are fighting a certain type of enemy for far too long, making you want a break from constant sneaking and killing, but making the arrival at the next neutral station feel that much more accomplished.
Overall this is one of the best triple A titles you will find with good story and game