Hey, I helped my friend GlitchedLife beat all Halo Campaigns 1-4 so he can get the Helioskrill, but the Legend achievement says 62% completed. I dont know is it because we did the flying skull through Halo 3? Because he did receive the Halo 3 legendary achievement. He also did some solo Halo 2 missions, but idk if that really matters. Thank you!