[A quick forward: Though I do own the game, the version I'm reviewing happens to be the PDF version, rather than the dead-tree edition. I'm working on the supposition that if anything changes between the two, it'll only be for the better, as the lag time will give the publishers a chance to correct errata, polish details, etc.]
It's usually acknowledged that, in the world of roleplaying, science fiction tends to get the short end of the stick. The gaming hobby is fairly dominated by the Fantasy genre (with Horror also well-represented), but with the exception of a few stand-out games over the years -- Traveller, Star Frontiers, Alternity -- the SF corner of the hobby is a bit anemic, and most of what's offered tends to be of the "blended" variety, with games like Rifts and Shadowrun offering two great tastes that sometimes taste great together, but can just as often get in each others' way.
Well, to that august line of SF games, we can now proudly add Eclipse Phase, and I wouldn't be surprised if this one stands the test of time as have the big names before it.
Physically, it's a good-looking book, a full-color hardback weighing in at 400 pages (again, I'm working from the PDF, but that means that the only part of that that I haven't sampled personally is the "hardback" part). Table of Contents and Index are both actually useful, something of a rarity in the RPG world, and while it suffers from its fair share of typos and errata, they seem to be no more severe than what one usually gets in an RPG first printing.
The premise, while not unique to SF, is one that hasn't made the rounds as often in gaming circles, and thus remains fairly fresh. At some undetermined point in the future, after achieving the Singularity, the human race is hoisted by its own petard as a group of rebellious AIs, dubbed the TITANs, make short work of us and drive us off-planet. With Earth now an irradiated wasteland occupied by killbots and murderous nanite swarms, we're forced to push into the rest of the solar system, but we're aided by a level of technology practically undreamed of -- FTL communications, cornucopia machines and even consciousness transferal have made Humanity into Transhumanity, and opened the doors to as many new adventures, and new dangers, and they've closed on old ones.
Players take on the roles of agents of Firewall, a shadowy organization composed of members from numerous different factions, each drawn to the chance to protect this fragile new Transhumanity from itself, as well as outside sources. The incredible technology that is at their disposal allows for truly mind-bending play: body-swapping, "forking" (copying one's mind into another form, essentially cloning), and consciousness backups create a game where physical death is often only a temporary setback, and where a character's mental attributes mean much more than their physical ones.
The game engine itself is a straightforward percentile system, with a few interesting twists, such as Moxie points, which can be used to swap the digits on a die roll (reversing the 1's die and the 10's die), often turning a really bad roll into a really good one. It's clean, it works well, and it's always easy to teach new roleplayers how to play a percentile-based game, as it's easier to simply say "you have a 50% chance of doing this" rather than explaining all of the statistical math inherent in most other systems.
And one of the most innovative bits: All of this is being released under a Creative Commons "copyleft." That's right: Provided that you're not doing it to turn a buck, anything and everything in the books can be copied, pasted, mixed, matched, hosted, etc. to your heart's content, legally and with the blessings of the publishers. Essentially, if you know where to look, the game is free, and fans will undoubtedly contribute a vast store of material. As with all fan-made creations, some of it will be great, some of it will be terrible, and most of it will fall somewhere in between, but one thing that those fans won't have to put up with are cease-and-desist letters from an angry publisher. The whole thing falls very much in line with the designers' views, lending a sort of pleasant surreality to the idea of a free game that sports themes of freedom of information (among others).
With a slew of unique ideas supported by a solid system and some clever distribution concepts, Eclipse Phase is definitely worth your time, and it belongs in the collection of any gamer serious about expanding his collection of SF RPGs.