so me and 3 other clan mates have just completed crota on normal without dieing from start to finish bearing in mind there was only 4 of us. non of us got the achievement also we did the clan member achievement and that didnt pop up either anyone know why this might be ? cheers. thanks everyone for your support i've just just got both flawless raider and raiding party with a fireteam of 4 thanks alot guys :D