SUMMARY: This game is a carrot on a stick. You will not reach any satisfying conclusion to the story. A big deal for a completely story driven game.
I have played this for more than 30 hours, unlocked and viewed all content, was active on the discussions (more of lurker, but had 30+ posts as well). I did not want to review the game till I was sure I'm "qualified" to give an honest review.
I'll first describe how the game works. It's a "massively multiplayer story game" where you access a 3D database that is presented in the form of 10 chapters, each with a sequence of "nodes" for you to investigate, each node containing something to drive the story forward: a video (with human actors), text, portions of documentaries, letters, diary entries, photos, etc, The story revolves mostly around 4 individuals portrayed by human actors and is presented as a Sci-Fi mystery. The multiplayer aspect comes in play in these nodes. Once you're done checking the content of the node, you may choose to participate in discussion with other players. As in a forum, you may post a discussion or reply to an existing discussion of the node. You may also like/dislike individual posts. Liking a post rewards the post's author. In each chapter there are locked nodes accessible only after receiving a certain number of likes. This number increases the deeper you get into the game. This feature encourages players to participate in the discussions to piece together the story.
As to why I cannot recommend the game, there are reasons pretaining to the story and there are technical reasons. In regards to the story, it starts pretty strong and you feel that you want to find out where it will all lead. Very positive first impression. Unfortunately, with every passing chapter, the story grew more cryptic, secrets were piled upon secrets and nothing was resolved with clarity. The biggest revelations usually come in the video clips with the human actors, however those are aren't very common and it's aggravating when you finally reach a video node and discover that it's the same video you saw in the last chapter, with a few more seconds added in that have no real bearing, nor provide any revelation.
You will spend hours agonizing over blurred photos, spliced video frames and cryptic doodles, all because you think that a revelation is just around the corner, but you only get buried deeper and deeper into the mystery. It just feels like the authors threw a bunch of cool ideas together and presented it to their audience, thinking their audience will be satisfied filling in the gaps. I don't mind a good open-ended story that stimulates discussion, but this is just a skeleton of a story and towards the end of the game major plot points are never resolved. You conclude the game with more questions than answers.
As to technical issues, the game prouds itself on its innovation and creating this new format of storytelling. I do commend them for it and I appreciate it when developers come up with new ideas in the increasingly saturated games market. However, the format is broken. It can be fixed, and I believe it can work, but in its current form it is broken:
1) Discussions are mandatory to unlock content. That's really cool, it makes people participate. However, by the time you'll probably play it, most of the nodes have been discussed to death. There is nothing useful you can add. You will struggle to find something of value to say, yet you do have to say something if you want to unlock content.
2) Liking AND disliking both unlock content! This is probably a bug, but IMO it is a major bug. It allows trolls to spout aggravating posts which people will dislike (helping the troll unlock content) while thoughtfull well-writted posts get buried.
3) There is an activity feed that gives you notifications when people like a post of yours, comment on a post you liked, reply to your discussion, etc. This feed is broken. It only allows you to see about 15 notifications, the rest won't load and thus you will not find out what people replied to you. This is in a game that focuses on discussion as a primary form of gameplay. I have reported this (and players) to the developers, but nothing was done about it.
EDIT: Point #3 was addressed (19.09.14)
I was honestly enjoying it up till around the middle. Towards the end I felt the excitement fizzle out of myself and fellow investigators (you will see familiar names as you progress). All the investigations we did never really got us to anything concrete and nobody can claim to know what the story is really about, it is just theories at this point.
My suggestion to the developers is to fix the technical issues and rethink some of the social aspects in this game and come back with a story that actually has a plot, climax and ending. They are on to something with this idea, they are just not there yet.