With Mankind Divided on the horizon, and having just finished Deus Ex: Human Revolution, here are some impressions for those of you who haven't played it...you know, both of you:
The story: The year is 2027, a sort of alternate near-future where cybernetic enhancements (aka "augmentations") are a relatively popular phenomenon - for people who can afford to get them and then take the stabilizing drug known as neuropozyne - but it's not without its controversy and its opponents who want to see it regulated. You play Adam Jensen, a cop-turned-security officer at Sarif Industries, an augementation technology firm. A terrorist attack at your firm leaves you wounded in one arm and your chest, but while you're unconscious, your boss says "Fuck it...augment ALL the things!" so once you wake up you've got augmentations in both arms, both legs, your chest, your back, your head...but of course, since you're still injured, you can activate them piecemeal with software (hence the upgrade system.) Even though "you never asked for this," you've got a job to do, mainly, figure out who's behind the terrorist attacks, bring them to justice, and maybe decide the fate of humanity while you're at it.
As far as a AAA game goes, it's a pretty good story. It does get a bit heavy-handed at times, but it also does a good job as painting each character as not fully good or not fully evil, and with justification for their ideals and actions. That includes yourself.
There are multiple endings, and I won't spoil them, but I really wish your actions leading up to the endgame would help you decide (or even make your decision for you.) Getting all the endings is a trivial exercise, so even though they're all great sequences, they lose most of their impact when you just save/load to watch the next one.
The gameplay: It's designed as a stealth game, but if you want you can play it as an action game. You can sneak around, trying not to activate alarms or have the enemies be alerted, quietly knocking them out, or you can melee kill them, or just shoot them in the fucking head. It's up to you! (Only there's an achievement for beating the game without killing anyone - bosses excluded, you gotta kill something like 3 or 4 - so you should try to play it as a stealth game at least once.) I am by no means good at stealth games, because I'm impatient, so I did a LOT of save/reloading that I could have avoided by just waiting in the first place. Still, the gameplay was pretty fun, even for a genre I'm not really into.
The graphics: They hold up. It's been five years or so, but I thought it looked really good, especially the artsy cutscenes that try to make the game look more poignant than it is. They could have spent a little more to get better mouth animation to sync up with the dialogue. It's not "ba ba ba" bad, but it's noticeable that they just went with "general idea of talking."
The dialogue and audio: Jensen's voice does get a little tiring after a while. He sounds broody even when he's being sarcastic. There are no real famous voice actors I could identify, but I did like the voice of your boss, David Sarif, who sounds like a CEO: part smarmy huckster, part sly politician, part boss who tries to be your best friend. The dialogue in no way sounded bad or unnatural, except maybe for some of the Chinese characters speaking English. You could tell there were focus group meetings trying to find just the right note: sound authentic without being racist.
The length: It took me about 38 hours to complete. I got all but three achievements (I missed the one playing on hard difficulty, the one getting all the books, and the one for not tripping any alarms.) "How long to beat" says 42 hours for "completionist" so...I guess I'm about there.
The verdict: Even though it's not my genre of choice, I enjoyed this game. Definitely worth it to buy and play, especially when a Steam sale rolls around.