It's here! I found the document that affirms Sony and Eidos signed an agreement to made Tomb Raider 2 a Sony exclusive on videoconsoles. There are some sources, but this is the main.

Sony Computer Entertainment America Signs Exclusive Deal with Eidos for Tomb Raider Franchise; Lara Croft Videogames to Be Exclusive to the PlayStation for Game Consoles.

FOSTER CITY, Calif.--(BUSINESS WIRE)--Sept. 18, 1997--Sony Computer Entertainment America announced today that the Tomb Raider(TM) franchise, featuring leading character Lara Croft, will be exclusive to the PlayStation(TM) for game consoles.

Released in November 1996, the original Tomb Raider game from Eidos Interactive and Core Design, was one of the best-selling videogames of all time with more than 1.5 million units sold for the PlayStation game console worldwide. Marking its one-year anniversary with a highly-anticipated sequel, Tomb Raider 2 is scheduled for release in November 1997.

"Core Design and EIDOS have created the most successful original product in years that became a number one hit on PlayStation in the U.S. and Europe last year," said Phil Harrison, vice president, third party relations, Sony Computer Entertainment America. "The PlayStation console is the undisputed world-leader in videogaming and it is appropriate that two leaders in their field should partner up in this way for Tomb Raider."

"Given the worldwide domination of the PlayStation system, it's a natural for Eidos to partner with Sony Computer Entertainment America and Sony Computer Entertainment Europe," said Mike McGarvey, chief operating officer, Eidos Interactive. "We want our best-selling franchise to reach the greatest number of consumers and the PlayStation and its powerful CD-ROM software format satisfies this demand. The fact that the PlayStation will be the only game console on which you can enjoy the Tomb Raider franchise is a great statement for the platform."

Eidos Interactive develops and publishes interactive entertainment products for the PC, Sony PlayStation, Sega Saturn, Macintosh and Internet. Eidos Interactive is part of Eidos plc (Nasdaq:EIDSY), which includes Eidos Technologies, a software-based video compression and decompression company, Glassworks, a state-of-the-art post-production facility specializing in digital effects and video editing for the television and advertising industries, and an independent record label called Naked Records.

Sony Computer Entertainment America Inc. distributes and markets the PlayStation game console for North America, develops and publishes software for the PlayStation game console, and manages the U.S. third party licensing program. Based in Foster City, Calif., Sony Computer Entertainment America Inc. is a wholly-owned subsidiary of Sony Computer Entertainment Inc.

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CONTACT: Sony Computer Entertainment America

Molly Smith, 650/655-6044


Eidos Interactive

Gary Keith, 415/547-1280


You can check the source of the original text in this link:

Also, you can view news from IGN about the possible exclusive dated of 1997: