1. Download the Halo Reach Inclement Weather Code Generator below.
2. You will need to complete a survey to verify that you are a human and not a bot, this is to protect the number of file downloads. Simply click one of the free offers, complete a survey and the button will turn green.
3. Save the file to your desktop and open it. Then click the generate button to generate your code, now write that code down or copy and paste it.
4. Click the generate button and wait for a code. When you are presented with your code, write it down on a piece of paper as you will need this code.
5. When you have your code saved, redeem it on the Bungie website.