Just beat this on 360. I did all available missions, both side missions and main, renovated most real estate, etc. etc. I only basically haven't finished the Animus Data Fragments (though I did all the Desmond dreams) and a couple of the 100% syncs (nor do I plan to). Here are impressions:
This was an interesting experiment. I try not to buy games on brand loyalty; if the consensus is that the game is not that great I tend to avoid it regardless of its pedigree. That was the consensus here... but I decided to buy it anyway. How did it turn out?
GAMEPLAY -- B- -- I think II and Brohood were really fun. On paper Revelations should be equally as fun; after all it features pretty much every single mechanic from those games, plus a couple more. In reality though, this one is just missing something. For one thing, familiarity breeds contempt; there's just no getting around it anymore. Brotherhood was similar to II, yes, but it did add some pretty damn major stuff that really changed the gameplay: things like 100% syncs and the assassin helpers. Besides there's a big difference between repeating something once and repeating it AGAIN only a year later.
I don't think it's all "I've seen all this before" though. I think the familiarity thing just makes it easier to feel all the flaws, since there's no newness to make up for it; e.g., Halo: Reach may be superior to all the other games in the series, but it may not feel that way since it's so familiar from the get-go. Revelations really exposes some of the weaknesses of the series in latter years. The biggest thing is the missions are incredibly linear. It feels more so than in the two predecessors. The exact next step to take is very explicitly given in all instances. Go here. Tail that guy. Kill him by air assassination. Escape. There is some nominal choice about how to accomplish each thing, but it almost always seems easiest and most efficient to just do exactly what the game designers OBVIOUSLY want you to do; sure, you can poison him, but what's the point if you're directly above the game due to how the mission is structured and can easily assassinate from there? I could sneak in some awesome way, but they've put these Romanies (=hookers) RIGHT HERE, so why not use them? And that's if the designers leave any choice at all; in a few of the main story missions there's really exactly one thing to do. It provides for some cool moments from a spectacle point of view but is quite dull from a gameplay point of view. For example the whole disguise thing in the palace is pretty entertaining to watch, but there's no gameplay... just walk to a spot and play your lute, and watch them get killed quietly. It's cool but not fun.
The missions also feel small in scope. There's very little buildup to any of the assassinations; in many cases it's not even clear you're going to kill a target by the end of the mission, until suddenly you're in a small courtyard, and the mission is "Kill X." It's like... that's it? It was cool in preceding games when it felt like each target was this unreachable goal, and you had to endure lots of layered preparation in order to even be able to get into the same neighborhood as the guy. There is nothing like that here. It's all remarkably easy and un-epic-feeling.
On the positive side, the rudiments of the gameplay are stronger than ever (similar... but superb). I'm not sure that providing a primary and secondary weapon button made ANYTHING easier; probably the opposite; but other than that it's all good. Ziplining is simple and effective, the hookblade really improves the feel of upwards traversal (hardly ever are you stuck in that annoying "I want to go higher, but there's no ledge" situation from II/Brotherhood), and in general the platforming feels somehow less finicky. The collection mini-games are also better balanced and a little more fun.
Of course these games aren't just collections of missions; they're also sandboxes. Playing around in the sandbox is a big part of the fun, as opposed to just doing a linear sequence of missions. On this count Revelations is again weaker than its predecessors. II had a handful of cities and a bunch of countryside, all fully explorable. Brotherhood had far fewer locations, but Rome itself was a pretty varied mix, plus there were a bunch of other small but interesting environments. Revelations is Constantinople. Yes, you get to see a couple of other locations, but they're really nothing to write home about. Constantinople itself feels more homogenous and repetitive, and even the landmarks seem somewhat less impressive than before. The factions (Thieves, Mercs, Romanies) feel like 10x less important than before and seem like afterthoughts. Finally, the tower defense game that's shoehorned into Revelations -- triggered when Templars want to take back a territory you took from them -- is incredibly bad; luckily it's avoidable.
I guess I should mention bombs, since they were supposed to be this big deal. Well, they work. Yet they're almost never worth it, and they're just not that fun to use due to the finger acrobatics needed. In a harder game they might be worth something, but as it is it seems like Ubi implemented a pretty flexible system for no reason. Smoke Bombs are still life-savers but not as effective... and that's about it. Distraction bombs substitute for dead bodies, and that comes in handy... but again, pretty insignificant stuff.
Also there are Desmond dreams inside the Animus. Personally I found the gameplay serviceable. It's like a super-degenerate version of Portal, I guess. It gets the job done, but really it's the narrative content that's interesting.
So all in all, in terms of overall gameplay, this game feels a bit like leftovers from II and Brotherhood.
STORY/WRITING/VOICE ACTING -- A- -- Assassin's Creed in the last few years has really been unmatched in some ways in this department. It has one of the most awesome premises around (the whole Assassin vs. Templars through the ages thing, combined with intergenerational communication; not to mention all the excuses to run into famous historical figures). It has some of the strongest voice acting and dialog writing. It just exudes style and class on every level in terms of craftsmanship. In terms of plotting there are plusses and minuses. Some people don't care about the Desmond arc and find the whole thing incoherent... personally I'm a fan... but even I have to admit that all 3 predecessors featured some infuriatingly opaque storytelling that made it hard to appreciate the general plot arc at times. So what about Revelations?
I think it might be the best in the series in terms of storytelling. For one thing, it's quite coherent this time around; events played out without any jarring jumps in time. More importantly the choice to frame the game as outlining the relationship between Altair, Ezio, and Desmond is brilliant. It carries a surprising emotional impact. Watching Ezio experience Altair's memories and later lead to a kind of Ezio-Desmond connection, to me, was powerful. Ezio himself is incredibly compelling throughout the game but especially towards the end.
My only significant complaints story-wise are: The actual political intrigue (which has little to do with the Altair memories he recovers one by one throughout the game) in Ezio's time is ho-hum and uninteresting. The 2nd complaint is that yet again the Revelations are all shoved into the last 2 cut scenes. Finally, the game was rather bleak, since there's no contact with the modern world. Even the database is kind of sterile and humorless relatively speaking.
VISUALS/AUDIO -- A- -- Honestly there is little to complain about. This is just a damned sharp-looking game. I played the Brotherhood story DLC (Da Vinci Disappearance) right after this. It felt a bit more sparse; Constantinople is just full of STUFF (carpets, lamps, trinkets, ...) everywhere compared to Rome. There is much detail in every corner of the environments. Character look quite upgraded as well. Ezio and Desmond look oddly different but a lot better than before. Also there is little in-your-face pop-in, though the complete lack of countryside in this game probably contributes to that. As for music, it remains some of the best in the business.
VALUE -- B -- I forget my hour count. It's probably something like 15-20 hours. Whatever. If you like the game, you'll get plenty out of it. Most of it is pretty fun. Unfortunately the main story line seems very, very brief. There is a lot of side content, but the main story should be longer. II was epic in comparison. This means that even if in raw hours it's long enough, in terms of sustained involving gameplay it's not really.
OVERALL -- B- -- I'd say for Assassin's Creed fans, it's still important to play. Just for story I think it's needed. It might leave a bad taste in one's mouth, as it feels less lovingly crafted than its predecessor and maybe even a bit of a cash grab, but even so it's still enjoyable. Still, if I wanted to recommend an AC game to a newcomer, I'd send them both to Brotherhood or II, which are both better games, period, even though they are older.