Halo 4 Concept Artist Jonathan Bach

Concept art by Jonathan Bach, for the Halo 4 E3 live-action trailer.  Unfortunately not all of this vision was rendered for the final trailer.   Low res images here don't do the scenes justice, head to the artist's blog for higher resolution images and more.

Halo 4 is  the eighth installment in the Halo franchise, due for release on November 6th 2012

Jonathan Bach on Blogspot

Halo 4 official Website

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Street Fighter X Tekken Character Concept Art

Released March 2012 for xbox 360, and Ps3.

Developed by Capcom, Street Fighter X Tekken features characters from both the Street Fighter franchise and Namco's Tekken series, with Namco currently working on Tekken X Street Fighter.

Official Game Website
Official Capcom Blog

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Alf The Helper: You know I'm glad we decided not to mention the furore over Xbox 360 owners not being able to play online tag team matches like their Ps3 comrades.
Elderly: Indeed Alf, and I think we did the right thing by not talking about the characters on the disk that can only be unlocked by paying for them.
Alf The Helper: Yup as you said why court controversy!!
Elderly: Yes, now let me make you a nice cup of tea!! :)
Alf the Helper: Thank you mr.Elderly, just one tic and I'll turn off the .. micro...phone!!
Elderly: ?!!!
Alf the Helper: Ahem!...
Elderly: (Coughs.....)

Mass Effect 3 Art Patryk Olejniczak

Extraordinary fan artwork from the supremely talented Patryk "Garrett" Olejniczak.

Low res images only, full resolution images and eyepopping wallpaper from
his deviantart page
his personal blog 

Alf the Helper: Stunning!
Elderly: yup!

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See Mass Effect 3 Wallpaper on Eyesurfing

Clive Barker's Jericho (Xbox 360, Ps3)

Due 2007: Oct 23rd Us, and Oct 26th Eu

Mingling the darkest elements (we hope) of Barker's horror fiction and films, Jericho deals with the mysterious reappearance of a lost city in a remote desert. The official Jericho Website is structured like a short adventure game requiring you to search through a mini-labyrinth of creepiness to find more information about the game.

Jericho Official Website
Jericho Community Website (US)
Xbox 360 Screenshots IGN
Ps3 Screenshots IGN
Wallpaper from Justwalls

Clickable inkies clive barker's jericho xbox 360 ps3 previews concept art trailer

Bioshock Free PDF Artbook

Update September 20011
Apologies but it wasn't me, the PDF is gone :(
cultofrapture does have it's very own download page, wallpaper, screensavers, icons, and printable character papercrafts, yes!! print and fold your own character from the game :).

Cultofrapture downloads section

+

the soundtrack for free download.... hell all games should have such freebies
soundtrack from Gnomes Lair


To summarize:
Free Bioshock Artbook Pdf for download
On the premise that "everyone should be able to experience the beauty of BioShock" cultofrapture in association with the BioShock team have put together Bioshock: Breaking the Mold in two PDF versions: a smaller, ebook download, and a more hi-resolution version that you can take to your local printshop and bind.

Clickable inkies Bioshock Art book art work free download pdf concept art

James Hawkins Concept Art

concept artist for Gears of War.

James Hawkins Website

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Clickable inkies concept art James hawkins gears of war

Bioshock Concept Art

Due August 21st for Xbox 360 and PC, with ESRB M rated content including, Blood and Gore, Drug Reference, Intense Violence, Sexual Themes, and Strong Language. The game features interactive environments and player-driven choices, described by the developers as "emergent gameplay", which they promise will be "unprecedented" in the World of gaming. The game is seen as the "spiritual successor" to previous PC title System Shock 2.

Images from Bioshock Website

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Clickable inkies bioshock concept art xbox 360 preview

Concept Art God of War II

From Official GowII website

Clickable inkies Game Concept art God of war ii ps2

Naruto Xbox 360 Concept Art

Currently under development by Ubisoft. The game will be based on the English dubbed version of the anime, Naruto. With a 2007 TBA release date in North America, though IGN are quoting a European release on June 1st. So far, no plans for a Japanese release have been announced. An official title for the game has not yet been announced, though their unlikely to call it Lassie.

IGN first look
more images from narutofan.com
Ubisoft press release

Clickable inkies Naruto xbox 360 concept art game

Latest Concept Art from Assasin's Creed

Images from Playsyde.com

Clickable inkies assasins creed ps3 xbox 360 concept art

Star Wars Next Gen Trailer and Concept Art

Both Trailer and concept art were not originally intended for distribution outside of LucasArts, but they liked it so much, they just had to share. The trailer and images are a target for what the first Star Wars game created exclusively for next-gen consoles should play like. Game Title and Characters have yet to be revealed.

10mb Trailer and 2 more art pieces from Worthplaying.com

Clickable inkies Star Wars Next Gen concept art trailer

Kingdom Under Fire: Circle of Doom Concept Art

Due Japan Dec 31st with a US release to be announced, Kingdom Under Fire: Circle of Doom is an action role-playing game, where forces of light and darkness are locked in battle. Unlike previous titles in the franchise, which offered action-heavy real-time strategy, Circle of Doom enters the Kingdom of Fire universe as an action RPG. The game uses characters and story threads from other games in the series, and will feature randomly generated environments, fast action, and -- at times -- thousands of enemies on screen at once. This Xbox 360 game features four-player online play.

Sangyoun Lee, president of Korean developer Phantagram and director of Ninety-Nine Nights said "The simulation aspects aren't as strong as they are in Kingdom Under Fire Crusaders. The action elements are strong. If you have to ask, it's close to Capcom's Devil May Cry. We're aiming for a new style of action RPG."

Concept art from IGN

Clickable inkies kingdom under fire circle of doom xbox 360 concept art

Untold Legends: Dark Kingdom Concept Art

From Sony Online Entertainment (of everquest fame)

" After serving the King loyally for years in foreign conflicts, an elite unit of knights return home to find it a changed place. Appalled by the discovery that dark magic has corrupted their kingdom and that the King now plans to use them against their own people, the knights devise a plan to assassinate the malevolent ruler. When the attempt on the King's life is foiled, the would-be assassins barely escape and are on the run from an army they once served, the assassins must survive in a kingdom they no longer recognize."

IGN Screenshots
Sony Game info page and concept art