Halo 2: Activate Terminal 9 on Quarantine Zone.
Halo 2: Drive a Scorpion while playing as the Arbiter.
Halo 2: Complete Sacred Icon.
Halo 2: Complete Regret.
Halo 2: Beat the par score on Delta Halo.
Halo 2: Complete Delta Halo.
Halo 2: Activate Terminal 6 on Delta Halo.
Halo 2: Complete The Oracle.
Halo 2: Activate Terminal 5 on The Oracle.
Halo 2: Beat the par score on The Arbiter.
Halo 2: Complete The Arbiter.
Halo 2: Fly the Heretic Banshee on The Great Journey.
Halo 2: Activate Terminal 4 on The Arbiter.
Get killed by the Guardians.
Collect 2,000 campaign or playlist medals.
Halo 2: Complete Metropolis.
Halo 2: Beat the par score on Metropolis.
Halo 2: Complete Outskirts.
Halo 2: Activate Terminal 2 on Outskirts.
Halo 2: Fight alongside the legendary Chips Dubbo and listen to his words.
Halo 2: Complete any campaign level without dying on Normal or harder.
Halo 2: Complete Cairo Station.
Halo CE: Complete every level of the game on Easy difficulty.
Halo CE: Complete The Maw.
Halo CE: Complete every level of the game on Normal difficulty.
Halo CE: Complete Keyes.
Halo CE: Complete Two Betrayals.
Halo CE: Complete The Library.
Kill 1000 Grunts.
Kill 100 Flood.
Halo CE: Complete 343 Guilty Spark.
Halo CE: Complete Assault on the Control Room.
Collect 1,000 unique campaign or playlist medals.
Halo CE: Complete The Silent Cartographer.
Halo CE: Activate Terminal 4 on The Silent Cartographer.
Halo CE: Complete The Truth and Reconciliation.
Halo CE: Activate Terminal 3 on The Truth and Reconciliation.
Halo CE: Fight alongside Chips Dubbo and listen to his words of wisdom.
Halo CE: Complete Halo.
Halo CE: Activate Terminal 2 on Halo.
Halo CE: Complete The Pillar of Autumn.
Collect 500 campaign or playlist medals.
Kill 100 Elites.
Halo: Reach: Complete Exodus.
Halo: Reach: Now that's a value meal.
Halo: Reach: Complete Long Night of Solace.
Halo: Reach: Beat the par time on Long Night of Solace.
Kill 100 Jackals.
Complete 10 missions or multiplayer games.
Complete any co-op level on Normal difficulty.