i'm guessing your talking about Widelands? i havent seen any game called Wildlands on the n900...

Anyway i've been playing Widelands.. alot.. i have not seen it crash.. not even once (might just be luck).

I ran it just fine on an 850MHrz overclock.. it ran very smooth.

So either your damaging your device by running a way to high overclock (keep in mind that if the cpu cant handle the speed, it can screw up the data its proccessing, like f.ex. kill your savegame files when you try to save)

If that is not the case.. you found a bug that i could not find.. Or you need a reflash on your n900..

I hope you find out whats wrong, i can understand your frustration when considering your addicted to the game