What do I need to do to have my helioskrill? I have done every mission on legendary and nothing even the achievement of “legend” is locked and it says I had the 100% complete, AND WHY 343 DON’T DO NOTHING? YOU THINK THAT IF YOU IGNORED US EVERYTHING IS GONNA BE OKAY? Damn!
The achievement is 100% completed. Try loading up MCC again and it might unlock. Also it might be the issue of the Xbox live social and gaming being down.