Halo

Halo CE: Complete Halo.

Pillar of Autumn

Halo CE: Complete The Pillar of Autumn.

My Buddy Chips

Halo CE: Fight alongside Chips Dubbo and listen to his words of wisdom.

The Soldier We Need You To Be

Halo: Reach: Complete every level of the game on Normal difficulty.

Welcome to Reach

Halo: Reach: Complete every level of the game on Easy difficulty.

Send Me Out... With A Bang

Halo: Reach: Complete The Pillar of Autumn.

All Out of Bubblegum

Collect 1,000 campaign or playlist medals.

This Is Not Your Grave

Halo: Reach: Complete The Package.

Going Bananas

Kill 100 Brutes.

What About Bob?

Halo: Reach: Find and eliminate one of the hidden Ranger Commander Elites.

Dust And Echoes

Halo: Reach: Complete New Alexandria.

Front Page News

Halo: Reach: Find me in the club.

I Didn't Train To Be A Pilot

Halo: Reach: Kill 3 of the anti-aircraft batteries during New Alexandria.

New Ways to Save a Buck

Halo: Reach: Hear a familiar voice on New Alexandria.

Into The Howling Dark

Halo: Reach: Complete Exodus.

You Flew Pretty Good

Halo: Reach: Complete Long Night of Solace.

Just A Taste

Collect 500 campaign or playlist medals.

To War

Halo: Reach: Complete Tip of the Spear.

Spoilsport

Kill 100 Jackals.

The One Percent

Kill 100 Elites.

Your Heresy Will Stay Your Feet

Halo: Reach: Kill the Elite Zealot before he can escape during Tip of the Spear.

Mind the Skill Gap

Halo: Reach: Observe the logo of a buttoned-up mining company.

I Need A Weapon

Halo: Reach: Complete Nightfall.

Protocol Dictates Action

Halo: Reach: Complete ONI: Sword Base.

Balaho's Most Wanted

Kill 100 Grunts.

Two Corpses In One Grave

Halo: Reach: Kill 2 vehicles at once with the Target Locator during ONI: Sword Base.

We're Just Getting Started

Halo: Reach: Complete Winter Contingency.

I'm Sorry, Dave

Halo: Reach: Find the hidden binary signature.

World Traveler

Halo 3: Complete a match on at least 8 different multiplayer maps.

Just Browsing

Halo 3: Complete a match on at least 4 different game types in multiplayer.

Warden

Halo 2 MP: In Classic or Anniversary matchmaking, stop the killing spree of another player.

Tempered Blade

Win 10 multiplayer games.

Where Am I?

Complete 10 missions or multiplayer games.

Just Getting Started

Kill 100 enemies or players.

Your Journey Begins

Complete a campaign mission or a match of multiplayer.

Bite The Hand

Kill a 343 developer in matchmaking or someone who has this achievement.

The Guardians Are Coming

Get killed by the Guardians.