Here's the full list (spoilers below):
Dawn - Complete Mission 1 on any difficulty (10G) Requiem - Complete Mission 2 on any difficulty (10G) Forerunner - Complete Mission 3 on any difficulty (10G) Infinity - Complete Mission 4 on any difficulty (10G) Reclaimer - Complete Mission 5 on any difficulty (10G) Shutdown - Complete Mission 6 on any difficulty (10G) Composer - Complete Mission 7 on any difficulty (10G) Midnight - Complete Mission 8 on any difficulty (10G) Wake up John - Complete the Campaign on Normal or harder (20G) I Need a Hero - Complete the Campaign on Heroic or harder (40G) The Legend of 117 - Complete the Campaign on Legendary difficulty (70G) Lone Wolf Legend - Complete the Campaign solo on Legendary difficulty (90G) Skullduggery - Complete any Campaign mission with 3 or more Skulls on Heroic or harder (15G) Bropocalypse - Complete any Campaign mission co-operatively on Heroic or harder (10G) Bromageddon - Complete the Campaign co-operatively on Heroic or harder (40G) Contact the Domain - Find a Terminal in the Campaign (10G) Terminus - Find all of the Terminals in the Campaign (50G) Digging up the Past - In Mission 1, find and access Chief's record (20G) Midnight Launch - In Mission 2, get significant air in the Warthog at midnight (20G) This is my Rifle, this is my Gun - In Mission 3, carry a UNSC weapon all the way through on Heroic or harder (20G) Bros to the Close - Make it through Mission 4 without one preventable Marine death on Heroic or harder (20G) Mortardom - In Mission 5, hijack a Wraith and use it to kill at least four enemy Wraiths on Heroic or harder (20G) Explore the Floor - In Mission 6, trick or force a Hunter to fall to his demise (20G) Give Him the Stick - In Mission 7 in solo Campaign, take out both Hunters using only the Sticky Detonator (20G) Chief, Smash! - In Mission 8, kill 3 Crawlers in one hit with the Gravity Hammer (20G) Not Some Recruit Anymore - Rank up your Spartan-IV to SR-5 (15G) Movin' on Up - Rank up your Spartan-IV to SR-20 (30G) I ♥ Red vs Blue - Win 5 War Games matchmaking matches (10G) The Dongblainer - Win 20 War Games matchmaking matches (30G) Operation Completion - Complete a Spartan Ops Mission on any difficulty (15G) A Legendary Episode - Complete all chapters in Spartan Ops Episode 1 on Legendary difficulty (40G) Dedicated to Crimson - Complete all chapters in the first 5 episodes of Spartan Ops on any difficulty (80G) Crimson Alone - Complete a Spartan Ops chapter solo on Legendary (20G) Roses vs Violets - Find one of the RvB Easter Eggs in Spartan Ops (20G) Rescue Ranger - Save at least one Marine in Chapter 3 of Episode 2 of Spartan Ops on Heroic or harder (20G) Knight in White Assassination - Assassinate a Knight in any Spartan Ops mission (20G) What Power Outage? - Complete Chapter 4, Episode 5 of Spartan Ops without losing a generator on Heroic or harder (20G) No Easy Way Out - In Ch 1, Ep 5 of Spartan Ops survive all enemy waves during the defense on Normal or harder (20G) The Challenged - Complete a Challenge (10G) The Challenger - Complete 25 Challenges (20G) Armorer - Change your Spartan's armor in the Spartan Armor card (5G) Badge - Change your Emblem in the Spartan ID card (5G) PWND - Change your Service Tag in the Spartan ID card (5G) What a Poser! - Change your Spartan's pose in the Spartan ID card (5G) The Cartographer - Create and save a Custom Map in Forge (5G) Game Changer - Create and save a Custom Game type in War Games (5G) Snapshot! - Save a Screenshot from the Theater (5G) The Director - Save a Film Clip from the Theater (5G) Sharing is Caring - Upload a File to your File Share (5G)
Halo 4 will arrive on Xbox 360 from November 6th.
