User blog comment:Carbonite 0/MW3 Real Life Achievements/@comment-1840877-20120214215000/@comment-3123696-20120219182904

Per Aug. Making mods on the source engine, which is very simple tbh, takes a lot of time, knowing the commands, making the maps in hammer, making re-skins for Source engine weapons, making new models, etc. It takes a lot of time, and I don't even want to imagine how difficult would be with an engine like MW3's.