Registered: Feb 2003
Location: Shanghai, China
Games that are written for multiple platforms are written to middleware, something like Java. Therefore, the play experience will be dumbed down for the least powerful system, PS2.
Games that are written specifically for xbox, such as Splinter Cell, Deus Ex, and Ninja Gaiden, will never come out for PS2. Or if they do, they will come out later with worse graphics and worse gameplay. e.g. the PS2 has less usable RAM, so less things can be displayed on the screen or less options are available.
There are some games exclusive for one game system or the other, but sooner or later, that games, or something similar to it, will be available for either platform.
And don't forget: Xbox Live!
I have the world in my Palm