Deus Ex: Human Revolution - Director's Cut [Steam store page]
While the story is weaker than the original, this FPS-RPG still offers many viable playstyles - and a visually stunning world. And the Director's Cut does a slightly better job of integrating the DLC, although they're still sort of an independent experience.

You also get a few other perks like developer commentaries, although these don't have any visual indicators to show where they are, so they're hard to locate and activate as you're playing. The redesigned boss fights are a nice touch though, and definitely a welcome change compared to the originals.

S.T.A.L.K.E.R.: Shadow of Chernobyl [Steam store page]
It has potential, but feels like a game that hasn't yet been play-tested. There is a general lack of instruction about controls and the little that is given is as entertaining as reading a manual.

The open world seems interesting at first, but your character gets exhausted quickly and soon you're trudging at a snails pace across the vast terrain. The pistol you've been equipped with has terrible accuracy, and to hit anything you need to be right on top of it. This is an impossible feat when your opponents have assault rifles and your character dies with a couple bullets.

Twenty quicksave/loads later you've finally been lucky enough to run up and shoot your opponent in the face before he can reload. Yet the gun you just picked up wasn't automatically equipped, and as you switch to the unweildy menu to activate it the game doesn't pause and you are mowed down once again. Eventually you survive and get it equipped, but you have to press the reload key to actually load the gun.

Now due to invisible areas apparently high in radiation one of the missions in the starting zone seems impossible to reach, much less complete. Not to mention that once you have slight radiation poisoning you might as well just reload a quicksave instead of wasting large amounts of vodka and bandages.

The AI itself is decent and manages to put up a fight while not being godlike - though it does cheat by omnisciently knowing your location. AI enemies only show up on the map temporarily after they shoot, like Tom Clancy's Ghost Recon, which puts you at a bit of a disadvantage. Bushes can also be annoying - not obscuring your location to the AI, yet making it hard to aim.

It's a pity they didn't actually play their own game. It could have been fun, but there are just too many rough spots to make it worth struggling through as-is. Realism is fine, but not when it interferes with the game being fun/entertaining.

Deus Ex: Game of the Year Edition [Steam store page]
One of the best FPS I've ever played - fantastic story and detail. Each play-through you'll find new areas, people, and story that you missed before. Highly recommended