Totally an accident. went to do the game pass challenges and avengers pooped 5 achievements out.
I am not sure I knew this was a thing, but I like it.
Complete one level in a Battle Pass. - Halo Infinite
H3: ODST: Earn a Triple Kill medal with the pistol on any level. - Halo: The Master Chief Collection
H3: ODST: Find the 1st clue to unravelling the mystery. - Halo: The Master Chief Collection