1. Head over to the tutorials, and watch all 3 of them you will get about 750 renown by watching all 3. 2. Go to ubisoft club and go to rewards, then find the free renown booster and claim it. 3. Go back onto siege and go to the main menu. Then you will see a icon with a 1 on it, click on it and activate the 1 day bosster. This bosster will last for 24 hours, so make sure you make the most of it. 4. Go to casual or terrorist hunt. Then start play some matches. Make sure not to spend your renown. To get the achievement you need to have 5000 renown in your account. So just keep playing matches till you have 5000. With the booster you will get about 600 renown per match on casual. If you play terrorist hunt you will get about 200 per match.