I liked having voices for FF in Halo Reach but I think they should be usable in MM, firefight, and custom games.
They will be legacy unlocks (untill if I know or not Halo 4 will have a currency system), some will be easy to get, but they will be fun.
Examples for voice unlocks:
Captain Keyes- Beats Halo CEA on Legendary
Master Chief- Beat Halo 4 on Legendary
Cortana- Beat Halo 3 on Legendary
Johnson- Save Johnson from the Brutes in Halo 3 Legendary (first mission)
Dare- Collect all 30 audio logs in ODST
Buck- Beat Halo ODST on Legendary
Dutch- unlock the vidmaster challenge classic
Romeo- snipe 100 people in Halo 4 Matchmaking
Mickey- Kill 150 people with explosive ordinance
Sargent Forge- Beta Halo wars on insane
Professor anders- Beat Halo wars any difficulty co-op
Marine voice- Unlocked at start
Cater- Beat Halo Reach on Legendary
Kat- collect every single data pad on halo Reach
Jun- assassinate 250 people in MM or campaign in Reach
Jorge- Get a Killtacular in Halo Reach MM
Emile- killed 200 people with the shotgun in Reach MM
Covenant voices:
Truth- Unlock the Marathon Man acheivment in Halo 3
Arbiter- unlock ANY acheivment on halo 2 Vista
Elite voice for MM- unlocked at start
Grunt- Killed 1,000 grunts in Halo 3 >:)
Special:
Red vs Blue voice pack: (changes voices based if you are on the red or blue team).
Those are my ideas, what do you think?
