NGOHQ is hosting a really cool patch that enables multisample antialiasing on Batman: Arkham Asylum and ATI Radeon hardware. And this one actually does work, without crashes or anything.
You can get it over here.
ATI Radeon MSAA Fix for Batman: Arkham Asylum
Posted on Saturday, May 15 2010 @ 5:46 CEST by Thomas De Maesschalck