At the Tokyo Game Show, Epic Games’ Tim Sweeney discussed multi-core development, PS3’s Cell chip, and the possibility of user generated content on the Playstation 3, according to a report from Gamasutra.

Sweeney indicated that multi-threaded development takes “about twice the effort and development cost.” Speaking specifically about Cell, he claimed that development “required about 5 times as much cost and development time.” It seems like Sweeney accepts the fact that for CPU power to grow, they are going to have to go to a multi-core model, but the increased development costs are disconcerting.

Sweeney also mentioned that he was interested in bringing user-created content to the PS3. Sweeney’s comments indicated that Sony might be more favorable to providing user content on the PS3 Online platform than Microsoft. While it isn’t a lock that user mods and levels will be accessible to Playstation 3 Unreal Tournament 2007 gamers, this does seem to be a possibility at this point.