13 0 1Actions Report Solution This is an unmissable achievement if you are going through the Halo 2 campaign. This achievement can be earned on any difficulty.Here is a walkthrough of the level by Vezuvius if you need it:Showing only comment. Leave a comment. I have completed the Halo 2 Campaign probably 12 times since this game released, I keep getting the Halo 2 achievements but they keep unpopping? Never experienced anything like that except with this game and particularly Halo 2. So weird.Posted by GameZedd On 10 Feb at 03:57 Leave a comment