Completed the 4th mission on Normal or harder.
Simply complete the 4th mission on any difficulty higher than easy.
Completed the 7th mission on Normal or harder.
Simply complete the 7th mission on any difficulty higher than easy.
Killed 10 enemies in a Firefight or Campaign session with the M6G pistol.
Since you start the game with the pistol and it shows up only once in awhile afterwards, you may want to nab this achievement during the second mission when you first meet the Covenant. You can also grab it quite easily in firefight mode if that’s your thing. Like the DMR-you can also get this in Firefight by using the GRCHEEVOS gametype and equipping the NINJA load out.
Killed 7 Moa during the 2nd mission of the Campaign.
During this mission you will come across many Ostrich type birds that go running by. Gun them down when you see them. There will be two or three groups of them in case you missed some earlier on. Once 7 of the birds have been shot, collect your reward.
As an Elite, killed 5 Spartan players in Matchmaking.
When playing Invasion mode, you will switch back and forth between the UNSC and Elites. When you are the Elites, you just need to kill 5 of those pesky Spartans to get this achievement.
Advance any Commendation to its Silver state.
When you are on the Main Menu screen, go over to your tag and press A. Choose your Service Record and then choose commendations. Here you will see all the ones that you have earned. The commendations start at Iron and work their way up. You need to get one of them through Iron, then Bronze, then to Silver. Which one is easiest is obviously up to the individual and the Matchmaking and Firefight need to be done while online.
Earned a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking.
One of the easiest places for this achievement is at the Rally Point Alpha on Exodus. When you grab the jetpack and hop across the platforms with the Bullfrogs, you will encounter a wave of grunts. Simply launch into the air and toss a grenade down on their heads. Keep in mind that you need to be airborne and need to have juice in the jetpack. Freefalling from a jetpack launch won’t nab you this. Since it is right at a load point, if you don’t get it at first, it’s easy to reload to get to. This can also be garnered quite easily through firefight mode using the GRCHEEVOS gametype. Use the same technique as you would during the campaign, but you’ll have more targets to explode.
Purchased an item from the Armory.
This is one of the easiest achievements to get right off the bat. Enter the Armory from the menu and you will be able to purchase the UA on the Mark V [B] Helmet for 750 Credits. Once you confirm your purchase, it will give you your goods and 10 extra points.
Purchase an item from the Armory that requires the rank of Lt. Colonel.
To reach Lt. Colonel, you need to garner yourself 450K credits. It can take while to get there, but eventually you’ll reach it. No short cuts for this one. Once you reach it, you will have met the requirement for certain items in the Armory. Purchase one of those items and the 10 points is yours.
Completed a Weekly Challenge.
The weekly challenge will be listed under the daily challenges. While they will of course take longer to complete than the daily challenges, you do have an entire week to complete them.