Admire Sid Meier

[roguebanshee]

If it's really the same core under it all, that's quite a feat to have it be that modularized and running well on 5 different machines.

With a well designed OO model, it's not all that hard to do. Heck, it's the basis/goal of OO-programming, make different modules that can be reused for different platforms without any rewrites. There are seemingly just few people who do the design work and then make the presentation and data layers for different systems afterwards. Of course, you can't skimp on documentation if others have to implement your game module, and few have the knowledge to make things run smoothly on more than two different platforms.