User blog comment:KillingForPeace/Mods for console?/@comment-4808313-20120206173657

I wouldn't spend too much time hoping/waiting for it... ps3 games have supported mods in the past, though you could count them on one hand. (UT3 is the only one I know of for certain) 360 will likely never support mods. The closest they get to user-created-modding is in-game customization options (such as the 'Forge' mode in a few Halo games), which aren't really anywhere near as flexible as 'Modding Tools' are (such as the Creation Kit will be, and the G.E.C.K. and Construction Set are) Microsoft is all about control. They want to control what is being run on your Xbox as much as possible, and opening up what is essentially dev tools to users is certainly not high on their "What we are cool with" list ;-P

tl;dr : Sorry, but nope. At least not in the same way as PC.