Sony's E3 2007 keynote, President and CEO Jack Tretton announced a new partnership with developer NCSoft, creators of online titles like Lineage, Guild Wars, and City of Heroes. As part of the partnership, NCSoft will begin developing exclusive online titles for the Playstation 3 and its Playstation Network.
This exclusivity can apply to both new and current IPs, although no specific games were mentioned. "Only the Playstation Network can support the types of games that NCSoft has become famous for" says Tretton. At the moment, it is unknown whether NCSoft will continue to support other platforms.