Destroyed a Lancer while in a Racer
Killed 2 vehicles at once with the Target Locator during the 3rd mission.
Won a game of Invasion in the 1st phase.
Earned a Killing Spree in multiplayer Matchmaking.
As an Elite, killed 5 Spartan players in Matchmaking.
Let a teammate spawn on you 5 times in an Invasion Matchmaking game.
Scored 200,000 points in a Firefight game.
Scored 50,000 points in a Firefight game.
Completed a Firefight set on Legendary without dying.
Earned a Killionaire medal in Firefight.
Earned a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking.
Used the File Browser to upload a file to your File Share.
Recommended a file to someone.
Completed the 10th mission on Normal or harder.
Completed the Campaign on Normal difficulty.
Completed the 9th mission on Normal or harder.
Completed the 8th mission on Normal or harder.
Killed 3 of the anti-aircraft batteries during the 8th mission.
Completed the 7th mission on Normal or harder.
Completed the 6th mission on Normal or harder.
Reached the rank of Corporal in the UNSC.
Completed the 5th mission on Normal or harder.
Hijacked a Banshee during the Reach Campaign.
Used a Health Pack to replenish life after taking body damage.
Killed the Elite Zealot before he escaped during the 5th mission.
Traded weapons with an AI ally in Campaign.
Completed the 4th mission on Normal or harder.
Performed an Assassination on an enemy.
Completed the 3rd mission on Normal or harder.
Completed the 2nd mission on Normal or harder.
Killed 10 enemies in a Firefight or Campaign session with the DMR.
Killed 10 enemies in a Firefight or Campaign session with the M6G pistol.
Purchased an item from the Armory.
Defended yourself against Lamb's assault in the train station.
Used the Hack Tool to hack an object at a distance.
Found your way back into the ruins of Rapture.
Online: get 5 kills with every handgun in the game
Kill 100 pirates
Find and destroy a pirate gang
You reached chapter 1
Buy your first equipment
First artifact collected
Buy a good for the first time
Continue playing to unlock this secret achievement.
First assignment accomplished
Create a paint job or vinyl group.
Reach Driver Level 6 in Season Play mode.
Win a race using cockpit view.
Reach Driver Level 5 in Season Play mode.
Achieve Car Level 4 in Season Play mode.