- Skullduggery
Complete any Campaign mission with 3 or more Skulls on Heroic or harder.
Unlocked offline - 3 guides
- Midnight Launch
In mission 2, get significant air in the Warthog at midnight.
Unlocked offline - 15 guides
- Bros to the Close
Complete mission 4 without one preventable Marine death on Heroic or harder.
22 November 2012 - 10 guides
- Knight in White Assassination
Assassinate a Knight in any Spartan Ops mission.
22 November 2012 - 7 guides
- Game Changer
Create and save a Custom Game type in War Games.
21 November 2012 - 4 guides
- The Director
Save a Film Clip from the Theater.
21 November 2012 - 3 guides
- Snapshot!
Save a Screenshot from the Theater.
21 November 2012 - 2 guides
- Mortardom
In mission 5, steal a Wraith and use it to kill at least four enemy Wraiths on Heroic or harder.
21 November 2012 - 14 guides
- Explore the Floor
In mission 6, trick or force a Hunter to fall to his demise.
21 November 2012 - 18 guides
- Chief, Smash!
In mission 8, kill 3 Crawlers in one hit with the Gravity Hammer.
21 November 2012 - 11 guides
- Give Him the Stick
In Mission 7, in solo Campaign, take out both Hunters using only the Sticky Detonator.
21 November 2012 - 8 guides
- Roses vs Violets
Find one of the RvB Easter Eggs in Episodes 1 to 5 of Spartan Ops.
21 November 2012 - 11 guides
- Terminus
Find all of the Terminals in the Campaign.
21 November 2012 - 5 guides
- Movin' On Up
Rank up your Spartan-IV to SR-20.
20 November 2012 - 5 guides
- This is my Rifle, This is my Gun
In mission 3, carry a UNSC weapon all the way through on Heroic or harder.
20 November 2012 - 9 guides
- No One Left Behind
Save at least one Marine in Chapter 3 of Episode 2 of Spartan Ops on Heroic or harder.
19 November 2012 - 6 guides
- The Cartographer
Create and save a Custom Map in Forge.
19 November 2012 - 3 guides
- Bropocalypse
Complete any Campaign mission cooperatively on Heroic or harder.
19 November 2012 - 1 guide
- Digging up the Past
In mission 1, find and access Chief's record.
19 November 2012 - 14 guides
- What a Poser!
Change your Spartan's pose in the Spartan ID card.
18 November 2012 - 4 guides
- A Legendary Episode
Complete all chapters in Spartan Ops Episode 1 on Legendary difficulty.
18 November 2012 - 2 guides
- Armorer
Change your Spartan's armor in the Spartan Armor card.
18 November 2012 - 4 guides
- Crimson Alone
Complete a Spartan Ops chapter solo on Legendary.
18 November 2012 - 6 guides
- Operation Completion
Complete a Spartan Ops Mission on any difficulty.
18 November 2012 - 1 guide
- Lone Wolf Legend
Complete the Campaign solo on Legendary difficulty.
18 November 2012 - 9 guides
- The Legend of 117
Complete the Campaign on Legendary difficulty.
18 November 2012 - 3 guides
- I Need a Hero
Complete the Campaign on Heroic or harder.
18 November 2012 - 3 guides
- Wake Up, John
Complete the Campaign on Normal or harder.
18 November 2012 - 3 guides
- Midnight
Complete mission 8 on any difficulty.
18 November 2012 - 1 guide
- Composer
Complete mission 7 on any difficulty.
17 November 2012 - 1 guide
- Infinity
Complete mission 4 on any difficulty.
17 November 2012 - 2 guides
- Forerunner
Complete mission 3 on any difficulty.
16 November 2012 - 1 guide
- Contact the Domain
Find a Terminal in the Campaign.
16 November 2012 - 3 guides
- Badge
Change your Emblem in the Spartan ID card.
16 November 2012 - 4 guides
- PWND
Change your Service Tag in the Spartan ID card.
16 November 2012 - 5 guides
- The Challenged
Complete a Challenge.
16 November 2012 - 3 guides
- Not Some Recruit Anymore
Rank up your Spartan-IV to SR-5.
16 November 2012 - 3 guides
- Requiem
Complete mission 2 on any difficulty.
16 November 2012 - 1 guide
- Dawn
Complete mission 1 on any difficulty.
16 November 2012 - 3 guides
- I <3 Red vs Blue
Win 5 War Games matchmaking matches.
Locked - 2 guides
- Hanging on the Combat Deck
Win 20 War Games matchmaking matches.
Locked - 2 guides
- Dedicated to Crimson
Complete all chapters in any 5 episodes of Spartan Ops on any difficulty.
Locked - 2 guides
- What Power Outage?
Complete Chapter 4, Episode 5 of Spartan Ops without losing a generator on Heroic or harder.
Locked - 7 guides
- No Easy Way Out
In Ch 1, Ep 5 of Spartan Ops survive the enemy assault during the defense on Normal or harder.
Locked - 9 guides
- The Challenger
Complete 25 Challenges.
Locked - 2 guides
- Sharing is Caring
Upload a File to your File Share.
Locked - 4 guides
- Bromageddon
Complete the Campaign cooperatively on Heroic or harder.
Locked - 2 guides