Anyone playing it? TB made a video about it, so check that if you need more information. http://www.youtube.com/watch?v=MjTq4dTxh1w
But basically, the game has you playing as a cyborg samurai ninja with firearms and all sorts of awesome skills, fighting against a decaying human empire of spess mahrees, and another human faction which mostly uses robotic units.
Personally I've only completed two missions so far, and my impressions are as follows:
Its pretty gud.
The difficulty, even on the first two levels Ive played so far, is balls-to-the-walls high. The thing is, I've been playing solo, but you can play with 3 other people, either pubs or friends via invite. Playing solo, you pretty much need to never die, or you need to use a revival point, which you get 4 each day unless you want to pay for more (Platinum is the currency you need to pay for with real money, more on that later), or you die and have to start the mission all over again.
I played the first mission, wasted all my revival points, but luckily they refill every day. After this you get to start upgrading your character, or Warframe as they're called, giving them more abilities and better stats, for example, the Warframe Im playing as right now, Excalibur, has an awesome sword to slice spess mehreens to pieces, and one of his abilities is that he charges forward, slicing anyone who gets in the way.
The second mission, not having any more revival points, I played as stealthily as I could. Interestingly enough, stealth is more or less a very good tactic, however, even though I believe you can complete most missions in stealth mode (No way you can avoid killing people (Atleast I've never seen something like that happening)), you will eventually have to confront the marines.
The fighting reminds me very much of Mass Effect, without the cover system (The AI still uses a cover system), to keep things mobile. Staying on the move, attacking from the flanks, sniping the more dangerous marines from afar, lots of options on how you proceed to finish the mission.
And speaking of missions, Im not sure how many types there are, both Ive played so far have been "unique", other was a sabotage mission, the other a raid, in both you had to get from point a to point b, at which you had to either sabotage or capture an artifact, and proceed for extraction at point c.
But, the game is still in Closed Beta, so there's room for improvement. Speaking of which, the platinum system.
I was kinda put off by this. A lot of the cool stuff requires you to use platinum, including new inventory slots and Warframes. You do get 50 platinum to start with, which is about enough for, like, one Warframe and two item slots. If you buy some of the platinum, you get access to the forums and all that, basically become a supported, but it's still weird.
Anyway, you can check the game out at https://warframe.com/ ,