User blog comment:InfinitysCross/I had a question.../@comment-1942617-20110802191826/@comment-2008379-20110802193927

''They did it to add more strategy to the game. Being able to sit behind a wall, spray your assault rifle, and then wait a couple seconds before doing it again was too easy and made every gunfight the same in ME1. Having to select your shots and conserve ammunition ensured that combat was more varied depending on who you fought in ME2.''