here a topic where ppl could add each other to share their maps and custom modes in halo 5.
the only map i did as of now:
-Castle crasher ( map and a CTF mode) ( made by me: Frank1ller)
description: red and blue castle are facing each other in the sky connected by a big bridge. a CTF mode where the sword is the only weapon allowed. a kind of medieval-theme game.
so go take a look and share your creation.