Put on your boot partitions—the SteamOS beta has released to the public alongside the initiation of its beta program, which will put 300 prototype Steam Machines into the wild. For the estimated 7,129,999,700 of us not selected for that program, a living room machine running the new, free, Linux-based OS is still doable, though installing it may require some tinkering—Valve suggests you wait until 2014 unless you're an "intrepid Linux hacker." Challenge accepted.
At the time of writing, Valve has not officially announced that SteamOS 1.0 "Alchemist" is available for download. We expect a page to go live at store.steampowered.com/steamos/beta/ later today. [Update: it's live.] Steam Universe group officer Jvert (presumably Valve engineer John Vert), however, has confirmed that the correct download link is at Steam PoweredOR Torrent
Unfortunately, that download will most likely fail right now. To help spread the data, Steamdb has created an unofficial torrent, but use caution when downloading from any unofficial source. [Update: Valve has provided MD5 and SHA512 checksums to verify that your download is genuine.]You can find system requirements and installation instructions in the official FAQ—note that AMD graphics cards are not currently supported.
SteamOS is meant to free Steam's game library from the desktop, extending Valve's domain to the living room with a superior couch-based PC experience and some of the features that have become standard on consoles, such as media streaming services. For Valve, it's also about declaring freedom from Microsoft—SteamOS will only run games with Linux support (of which we expect to see many more in the coming year). That bold statement is tempered by the ability to stream games from a Windows PC to SteamOS over a local area network, though how much it's tempered will depend on how well streaming works.
We'll be playing with SteamOS this weekend, and plan to have impressions and installation tips for you as soon as possible. If you're the patient type, Valve's Steam Controller and third-party Steam Machines will be available until next year, no "Linux hacking" required, presumably.
All links lead to magnet URIs, use any modern torrent client to download.
Open the .iw5dlc file to install - requires the latest version of IW5M.
The free Face Off maps and Terminal can be obtained by verifying your game files using Steam - you may need to remove caches.xml from the game directory to get IW5M to work properly again.
Note to seeders: all files except for the .iw5dlc match the original files - you don't need to download them all off of the initial seed.
This map, which is an airport terminal, is full of luggage, bars, and small shops; the outside area of the map, where planes and cargo are stationed, has many tiny areas that are accessible as well.
Security checkpoints and barricades make the map very maze-like. Players can even head inside one of the planes. This and the indoor areas can provide some cover from enemy killstreaks, but there are many overhead windows that should be avoided indoors, so the plane is the safest place to be as it is well protected from any airborne threat. The main hallway overlooking the outside part the map which has been given the name the Hallway of Death, should be avoided the most. The store in the centre of the map is an excellent place to go as it has views outside the airport as well as being adjacent to the hallway.
The map is mainly filled with tight turns and medium range combat. As a result, Assault Rifles and SMGs are most effective, and thus most common, while Grenade Mortaring is common where guns don't always have straight lines of sight. Smoke Grenades are useful for moving around the map without drawing sniper fire.
Because of the large amount of glass on the map, attaining FMJ penetration kills is more common on Terminal than on other maps with little cover such as Wasteland.
Also, the jetway connecting the plane to the terminal building has an open section above the plane's door which allows space for Predator Missiles and other such explosive weapons to enter.
( source : wikia.com )