Halo 4 has Achievements spanning both the campaign and the multiplayer. The Achievements are as follows:
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Digging Up The Past[edit]
In Mission 1, find and access Master Chief's record.
Use the staircases to your right and left right after leaving the stasis room to get up to the room with the terminal. Head down the stairs and activate the Terminal for the Achievement.
Midnight Launch[edit]
In Mission 2, get significant air in the Warthog at midnight.
This Achievement actually requires you to play the game at exactly midnight according to the Xbox 360's internal clock. Then, simply jump the Warthog like the Achievement says.
This Is My Rifle, This Is My Gun[edit]
In Mission 3, carry a UNSC weapon all the way through on Heroic or harder.
To get this Achievement, simply carry the Magnum through the entire level. This will leave you sniping throughout a lot of the mission, but if you want the Achievement it's a sacrifice you'll have to make.
Bros to the Close[edit]
Make it through Mission 4 without one preventable Marine death on Heroic or harder.
After you meet up with the UNSC Marines in the second mission, simply don't let any of them die. This means you'll have to be on lookout duty for them, taking initiative with sweeping up the enemies before they can get to your guys.
Mortardom[edit]
In Mission 5, hijack a Wraith and use it to kill at least four enemy Wraiths on Heroic or harder.
Note that you do not have to use the same jacked Wraith to kill all four of the enemy Wraiths. If your first ride is destroyed, it's perfectly viable to grab a second one and keep on dishing out the punishment. When jacking a Wraith, use a Plasma Pistol to shoot the Elite gunner before jacking the ride. That'll prevent you from taking extra damage when jumping on the ride.
Explore the Floor[edit]
In Mission 6, trick or force a Hunter to fall to his demise.
Use the Fuel Rod Cannon in conjunction with the explosive containers in the third spire to propel a Hunter off of a ledge.
Give Him the Stick[edit]
In Mission 7 in solo Campaign, take out both Hunters using only the Sticky Detonator.
Naturally, the best way to take out the Hunters is to attack their weak point at their lower back.
Chief, Smash[edit]
In Mission 8, kill 3 Crawlers in one hit with the Gravity Hammer.
You can do this Achievement on any difficulty, so grab it on Easy if you miss it the first time around.
