How exactly are you defining "niche" games?
Case in question, I expect Platinum to outsell MadWorld with Bayonetta.
And as for Okami, weird comparison. On one hand there was a much bigger PS2 install base, but on the other hand the PS2 150k number is Japan only - or am I reading it wrong in the game database?
Edit:
Btw, why didn't you pit MadWorld against God Hand? It was by Clover, and it's much in the same spirit.
Again, I don't think we have complete sales data for God Hand as I only see Japan numbers, but since it sold 38k first week in Japan I think we can say MadWorld is undertracking God Hand to date?







