Hello, i recently got the legend achievement from the mcc but have not received Helioskrill, i thought it might be a delay but its already been a day and idk what to do pls help.
Go back to MCC. Change a customization item (multiplayer skin, banner, emblem, etc). Make sure the change is saved. May help to play a match of multiplayer. May help to also open the Halo Channel app. After all that, go back to Halo 5, and check your collection for Helioskrill.