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Wake up Buttercup-25g
Destroyed the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder.
After you exit the Cutscene in space on the mission “Long Night of Solace”, fly straight behind the Corvette and take aim at one of its four engines. As soon as it says Objective Updated, start firing your missiles. After that engine blows up, aim at another one. Once all four are destroyed, start flying around destroying banshees. Don’t wait for it to say Objective Updated this time, as you will lose valuable time.

Tank Beats Everything-25g
Finished the 9th mission on Legendary with the Scorpion intact.
A short ways into the 9th mission, you find a random Scorpion tank on the ground. Get in there, and advance through the mission. This part can be tricky, but after you die some you should know where all of the enemies are and be able to beat it fairly easily.

Lucky Me-25g
Earned a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking
Just hold the jetpack button while killing enemies in Firefight, and this is yours. This should easily be gotten at the same time as “Game, Set, Match” and all of the other Firefight achievements.

KEEP IT CLEAN-5g
Killed 7 Moa during the 2nd mission of the Campaign.
Moa are those funny-looking ostrich things on the mission “Winter Contingency”. They only take one bullet to kill, and there a ton of them running around. Kill seven of them and you’re done.

I Didn’t Train to Be a Pilot-10g
Killed 3 of the anti-aircraft batteries during the 8th mission.
The anti-aircraft batteries are the turrets that shoot green explosives at you. It’s almost impossible to NOT get this achievement, unless you go out of your way to not kill any of them.

Doctor, Doctor-5g
Used a Health Pack to replenish life after taking body damage.
After your shields are taken all the way down, you start losing health, which doesn’t replenish naturally. Whenever you see that your health isn’t full, find a Health Pack, the big white things with red crosses on them. Hold the pick-up weapon button, and your health should replenish.

That’s a Knife-10g
Performed an Assassination on an enemy.
You perform an assassination by going up behind an enemy and holding the melee button. There is a designated part in the mission “Nightfall” where you’re told to assassinate an Elite, so you should get this achievement naturally.

I See You Favor a .45-10g
Killed 10 enemies in a Firefight or Campaign session with the M6G pistol.See “An Elegant Weapon”

An Elegant Weapon-10g
Killed 10 enemies in a Firefight or Campaign session with the DMR
You should absolutely get this naturally during campaign, but if you don’t, simply follow the rules from “A Spoonful of Blamite” but swap out the Needler for this gun.

Swap Meet-10g
Traded weapons with an AI ally in Campaign
In campaign you’re able to trade weapons with the Marines that fight alongside you. Walk up to a Marine and hold the pick-up weapon button, and he should willingly trade you guns. After that, achievement unlocked.

A Spoonful of Blamite-10g
Killed 10 enemies in Firefight or Campaign with a supercombine explosionA supercombine explosion is when you put so many needles into an enemy that they explode. The weapons you can do this with are the Needle Rifle and the Needler, although I’d recommend the Needler. If you don’t naturally get this in campaign, just go into Firefight and make your own gametype where you spawn with a Needler. Kill ten enemies and you’re done.

Be My Wingman, Anytime-5g
Let a teammate spawn on you 5 times in an Invasion Matchmaking gameIn Invasion when you die, you can spawn by your teammates if they’re in a safe place. Just go into Invasion and hide in the back. Your teammates will keep rushing out and dying and spawning on you. You should get this pretty quickly.

Yes, Sensei-10g
Earned a First Strike Medal in a Matchmaking game.
The first strike medal is awarded for getting the very first kill of the game. You should get this naturally while playing matchmaking. If you have any trouble with it, just start new games and spring straight at the enemy and nade them from the beginning.

Skunked-10g
Won a game of Invasion in the 1st phase
This achievement is pretty self-explanatory. Simply go into a game of Invasion (preferably with a team) and hope you get the defense team. If you do get defense, just stop the other team from scoring once. When you do that, you’ll unlock the achievement.

What’s a Killing Spree?-5g
Earned a Killing Spree in multiplayer Matchmaking.
A killing spree is when you get 5 straight kills without dying. This shouldn’t be too hard for anybody to get. If you are having trouble with it, I’d recommend camping with a shotgun or sword in the Rumble Pit playlist. It’s very easy to get kills in there.

Crowd Control-10g
Earned a Killionaire medal in Firefight.
See “Game, Set, Match”

Knife to a Gunfight-5g
As an Elite, killed 5 Spartan players in Matchmaking.
Go into the Invasion playlist, and you should get this while you’re on the Elite team. If you don’t, just try again.

Score Attack-10g
Scored 15,000 points in Score Attack Firefight Matchmaking
To get this achievement you don’t actually have to be in Score Attack. Just go into the Firefight Arcade playlist, and you should have no problems getting 15,000 points.

Firestarter-10g
Scored 50,000 points in a Firefight game.
See “Game, Set, Match”

Blaze of Glory-25g
Scored 200,000 points in a Firefight game
See “Game, Set, Match”