i finished all mcc on legendary halo 1 to 4 and havent got the helioskrill armor yet, i got the legendary achievemnt 
It sometimes doesnât work and you donât receive the helioskrill armor when you should - this is why it went into gold packs - because people were having problems with the achievement.
If you open enough Req packs I am pretty sure you can still get it, just got to hunt long enough.
did you finish reach and odst also on legendary
> 2535416920373144;5:
> did you finish reach and odst also on legendary
Those are DLC and should not be required for the helioskrill unless they updated it. The armor unlock should trigger with the Legend achievement.
I didnât get the armour until completing Halo 1,2,3,3ODST, reach, 4 along side with 5 just so I havenât missed anything
> 2533274977529309;1:
> i finished all mcc on legendary halo 1 to 4 and havent got the helioskrill armor yet, i got the legendary achievemnt 
Report to 343 and wait. It might take a bit. As I remember being surprised at getting the weird armour set a while after 5 launch
> 2535454302176535;8:
> > 2533274977529309;1:
> > i finished all mcc on legendary halo 1 to 4 and havent got the helioskrill armor yet, i got the legendary achievemnt 
>
> Report to 343 and wait. It might take a bit. As I remember being surprised at getting the weird armour set a while after 5 launch
Idt they ever fixed it. I think the way they âsolvedâ the problem is by throwin it in gold packs.
Buy a lot of golden packs dude, i can get that armor of that way.
> 2535436557871072;9:
> > 2535454302176535;8:
> > > 2533274977529309;1:
> > > i finished all mcc on legendary halo 1 to 4 and havent got the helioskrill armor yet, i got the legendary achievemnt 
> >
> > Report to 343 and wait. It might take a bit. As I remember being surprised at getting the weird armour set a while after 5 launch
>
> Idt they ever fixed it. I think the way they âsolvedâ the problem is by throwin it in gold packs.
I would still report it.
I did the same thing as my complete MCC on legendary didnât appear for a week. Reported. Around 1h later and boom it appeared.
> 2533274807802500;6:
> > 2535416920373144;5:
> > did you finish reach and odst also on legendary
>
> Those are DLC and should not be required for the helioskrill unless they updated it. The armor unlock should trigger with the Legend achievement.
Pretty sure the achievement now require reach and Odst.
normally it unlocks immediately.
For players going after the coveted Helioskrill and other armors by playing Halo: The Master Chief Collection, a common issue is that the armor and helmet donât appear in the Halo 5: Guardians REQ collection after unlocking the requisite achievements in MCC. If you are suffering from this issue, worry not! Below is a list of steps you can take that has solved the issue for most players with this problem.Hereâs what you can do if youâre having trouble getting Helioskrill through playing MCC. These steps should also work for Mark VI GEN1 and Mark VI GEN1 Scarred, which are also obtained by getting achievements in MCC.
- Verify that you have received the appropriate achievement in MCC: âLegendâ for Helioskrill, âCairo Stationâ for Mark VI GEN1 Scarred, or âYour Journey Beginsâ for Mark VI GEN1. If the achievement isnât there, check your MCC Service Record on Waypoint for any missing campaign missions. - If you have the achievement and still donât have the armor, take the following steps:
- Close Halo 5. - Open MCC and the Halo Channel app. - In MCC, change a customization item, such as an emblem, nameplate, multiplayer skin, etc. - Begin any campaign mission or play a round of multiplayer in MCC. This should ensure your game syncs with the Halo servers. - Go back to Halo 5, and check your REQ collection.If you have taken all these steps and your armor still didnât unlock, feel free to make a post in the H5 Support Forum detailing the steps youâve taken and any additional troubleshooting youâve done.And remember: Helioskrill and the other MCC armors are available in REQ packs in Halo 5, so if all else fails, you can keep playing Halo 5 to eventually unlock the armors through REQ packs.
> 2535461884091985;14:
> For players going after the coveted Helioskrill and other armors by playing Halo: The Master Chief Collection, a common issue is that the armor and helmet donât appear in the Halo 5: Guardians REQ collection after unlocking the requisite achievements in MCC. If you are suffering from this issue, worry not! Below is a list of steps you can take that has solved the issue for most players with this problem.Hereâs what you can do if youâre having trouble getting Helioskrill through playing MCC. These steps should also work for Mark VI GEN1 and Mark VI GEN1 Scarred, which are also obtained by getting achievements in MCC.
> - Verify that you have received the appropriate achievement in MCC: âLegendâ for Helioskrill, âCairo Stationâ for Mark VI GEN1 Scarred, or âYour Journey Beginsâ for Mark VI GEN1. If the achievement isnât there, check your MCC Service Record on Waypoint for any missing campaign missions. - If you have the achievement and still donât have the armor, take the following steps: - Close Halo 5. - Open MCC and the Halo Channel app. - In MCC, change a customization item, such as an emblem, nameplate, multiplayer skin, etc. - Begin any campaign mission or play a round of multiplayer in MCC. This should ensure your game syncs with the Halo servers. - Go back to Halo 5, and check your REQ collection.If you have taken all these steps and your armor still didnât unlock, feel free to make a post in the H5 Support Forum detailing the steps youâve taken and any additional troubleshooting youâve done.And remember: Helioskrill and the other MCC armors are available in REQ packs in Halo 5, so if all else fails, you can keep playing Halo 5 to eventually unlock the armors through REQ packs.
It is a very detailed explanation, something like that made a friend of mine who did work for him.
I hope you can get it fixed!
Try using gold packs, as its also in there