Treyarch is planning to do a little "official" modding of the PC version of Call of Duty: Black Ops, adding tools to enable user modding after launch. Treyarch's Cesar "PCDev" Stastny said on the game's forum, "We do not know yet to what extent you will be able to mod the game," citing some technical issues that have yet to be dealt with. "Right now we are completely focused on finishing the game."

Infinity Ward teased mod tools for the PC version of Modern Warfare 2, but that didn't end up happening. The good news is that if these Black Ops mod tools pan out, you can make all the Modern Warfare 2 levels, and then mod those.