A few thoughts about the game, after the first mission:
Imagine the original Deus Ex, reimagined for the modern gamer. A cover system is in and it is very smooth, all the good parts of Gears of War's cover system are in and the bad parts aren't. There is a stealth gameplay mechanic, complete with Metal Gear Solid or Splinter Cell style takedowns where you can render people unconscious in the most painful ways possible, including breaking their arms in two places first just so you can satisfy your sadistic urges before you knock them the fuck out. Hey, no one said non-lethal had to be pleasant like taking a nap!
Shooting is now based almost entirely on where your crosshair is, as long as you aren't moving. The wavery crosshair in the original game was always total bullshit until you increased your skills or used augs. This game is in every way possible a modern FPS/TPS hybrid. It also has some Mass Effect themed conversation pieces too, just to prove the point that everything and the kitchen sink is in this game.
Oh, and Square-Enix Visual Works contributes some kickass CGI cutscenes with some very impressible blood effects, something they haven't had a chance to let loose with until the recent Final Fantasy Type-0 and now this game. The budget behind this game was clearly tremendous, and no expense was spared to demonstrate to the gamer that no expense was spared during the cutscenes.
It's also amazingly faithful to the original game. There's an incredibly old-school inventory system. Augmentation is once again based on XP and a certain special item gained, though the one item now works for any aug you want to add or upgrade. Ammo is once again different for every gun (FUCK YOU INVISIBLE WAR!), and your limited inventory means you can't walk around with an arsenal of 8 guns and 300 rounds for each one.
You are given multiple pathways to every goal, including the infamously convenient air ducts which always go where you need to be. The voice acting is just slightly hammy, in honor of the hilariously bad voice acting from the original game. And yes, it actually seems to relate to the first game so far, unlike the second game which was so far removed in both scope and quality. This game manages to ooze a big budget and hyper-modern gameplay mechanics while also feeling true to the original. If the Eidos Montreal team was trying to prove how big they were fans of the original classic game, it's hard to say they couldn't have tried any harder.
Well, I guess that's all I can say about it now, I want to play more rather than write long-ass posts nobody will read anyways on GAF.