I haven't heard about this game. It really looks great!

After a short search I found that some of the main issues with running this game on the n900 are (that I can think of right now):
** Java is not exactly light or fast as c++ for example so there may be a problem performance wise resulting in low frame rate.
** Some of the game forum members (not me! as I haven't played it) mentioned that the game requires sometimes more than 400 mb (and even 600 mb) of ram, but the n900 may be able to overcome this by using the ~760 mb of the swap (if it can be used that way, I really don't know and feel free to correct me).
** The game requires OpenGL support, yet the n900 only support OpenGL ES 1.0 and 2.0, it may work with some kind of a wrapper (I have read about a TMO member who tried to write that kind of a wrapper but I don't know if it's still alive).

I would love to see it on the n900, but I think that the chances are pretty low...