Specifically
"The support Epic had misrepresented it would provide Silicon Knights... became increasingly inconsistent as both Silicon Knights and Epic progressed toward the target launch date for their respective games. Epic has attempted to avoid its obligations under the Agreement by representing to Silicon Knights that the support,
modifications, or enhancements to the Engine – all of which are essential to the Engine’s proper function – were “game specific” and not “engine level” adaptations, and that Epic therefore need not provide them to any of its licensees, including Silicon Knights."
It's claimed: "That representation is false, as evidenced in part by the fact that Epic later provided nearly all the Gears of War code to all of its licensees, at no extra charge, in a belated effort at damage control."
http://www.gamasutra.com/php-bin/news_index.php?story=14759
