The graphics are dated, really dated, and you can tell that right away. But somehow, the game itself does not appear to be ugly - the game doesn't try to be anything else but a good and easy linear adventure. But in general, the graphics are STATIC. As in, there's no wind, trees are frozen in time and space, no physics, no discernible effects on the environment by your actions.
The story is extremely easy to follow though. No need to memorize names, locations and tons of redundant quests. And there's an abundant amount of history to enjoy. I'm not sure how much of it is concrete though.
There is a certain degree of suspense in some levels and sequences and there is the ability to do some stealth killing.
You can play as one of the two Templar brothers, and you can switch in between the two any time you want, eventually, another character joins in.
You can also gain experience and exchange it for some combo moves, more health, etc.
You also get to collect some items that enable you to get one or another armor and weaponry.
Let's not forget about the co-op though. The bad thing is that I'm not sure how much re-playability this game has. So I would rather see this game as a lone experience and have other games that scream co-op to have co-op (Jericho for instance). Your AI co-op partner is okaish for the most part, and your stealth moves are apt to copying your moves, but sometimes your partner with end up on the ground which is when you have to revive him or her.
Also, it's rare in games when the two protagonists tend to agree with each other most if not all the time. The two characters you play as agree with each other constantly, unlike in Bulletstorm, Enslaved, etc. So even though there's enough scripted dialogue between the two characters, I would probably enjoy to listen to some arguments about the inquisition, the church, the main quest and what not.
The game is also easy, really easy, but eventually, it does require you to pull off some combos and some well-times blocks and counter-attacks to advance further.
The voice acting is pretty poor though.
In any case, I would recommend this game to anyone who wants to relax, who likes the hack'n'slash and anyone who wants enjoy a nice story.
Plus, you get to support a small company that made the game in the first place.