EnforcerSunWoo: It is most likely because Silicon Knights took Crystal Dynamics to court over the game.
http://law.justia.com/cases/federal/district-courts/FSupp/983/1303/1989612/
groze: Silicon Knights took literally every one they worked with to court (except for Nintendo, even though Denis Dyack terminated their relationship when they released the Wii because he didn't like the console, then sold their asses to Microsoft and their career started plunging horribly into the painful death they had some years back).
It's not even funny, SK ended because of that absurd Epic Games lawsuit that they lost, after Denis Dyack's project baby of decades, Too Human -- made using Epic's Unreal Engine--, turned out to be a commercial flop and not that good to begin with, gameplay-wise. Dyack thought Epic would be a good scapegoat for his own mistakes and shortcomings, and blamed Unreal for the game's shortcomings.
Please, there's a whole NeoGAF post-mortem of Silicon Knights that I urge everyone remotely interested in all this to read.
I am fully aware of Silicon Knights and their unending legal battles. The Too Human "for or against" thread was classic.