Why is there no unsc marines or odst in the game
Probably because both Osiris and blue team are tasked with special operations kinda stuff, no reason to send Marines when a Spartan fire team is all you need plus alot of the game takes place outside of UEG controlled space. At least that’s my guess
There are soldiers in the game from that one planet place with the strange AI governor though so I mean there are a few “marines”
Maybe in custom games you can add bots and these bots are marines odst or Spartans depending on intelligence level
There are some sort of UNSC foot soldier variants on Meridian.
Ya there was not need for marines or were even allowed at any of the places both fire-teams were at.