iTwitch: Some Halo 2 Vista sound files. Can't remember who made them. They are not ripped, but good enough.
Halo 3 + Halo Reach:
Omn1science: Zipped together all the sound packs I've downloaded over the years and uploaded them here: https://mega.co.nz/#!4chXBRzR!JzYeagdlBnXSpAK6lrz0_IkHSFNY6L7Q4KG_8K0h4l4
The pack has Reach and H3 medal audio, gun sounds, melees, and all kinds of other random stuff.
Revenge: uploaded the H4 soundpack I have. All credit to Sillygoose for making it :)
Vort3xMedia: soundpack I made for halo 4 forever ago: