Halo: Reach

*Must be done on Normal or higher difficulty*
"This is done on "ONI: Sword Base". After you have fought the onslaught of enemies that attack you. You will go around a bend and be put into a sort of bunker with opening doors. On the left you will see the Target Locator. Once the doors open, you will see a rock in front of you. At the bottom of the hill, you will see two wraiths appear and be near each other. Call in the strike in the center of both of them, and destroy them both at the same time. This may take some
timing and aiming/calling in the strike before they come to the area."

Thanks to Sidedish120 over at x360a for the description.

Just as a supplement to the above solutions, if you're on a clean up run for acheivements you can just start from the rally point alpha check point and you'll be at the exact point you need to be, no need to go through the first part of the mission :)

Must be done on at least Normal.

Start the mission from the beginning and fight the first couple of waves. Shortly after starting, you will push through the base and go round a corner and down a small hill, coming to a gated room/area. In this area, on the left of the room are some weapons. Pick up the target locator. Head out, and you'll see a Wraith. Wait a few seconds and another will come into view. Wait for these two to come within close range of each other, then target the area with the Target Locator. Boom!

In addition to said in other guides I'd suggest this. Just as you exit the hanger run just to the big rock on the left. You will see a jeep in flames going away from you and two tanks coming from both left and right. You must try to aim the ground where the jeep crosses the line between 2 tanks. Start aiming and charging the tracker just as soon as you come to the rock. If all done right the jeep will get destroyed and while the bombs arrive both tanks will enter the target area.

Mission 3 – Oni Sword Base

Mission starts at 0:15:36 in the walkthrough video below.

For this one, you’re going to first want to back out to the main menu, and switch to Normal difficulty to do "Two Corpses in One Grave". While it can be done on Legendary, it’s a royal pain because the Wraiths tend to spread out more on higher difficulties. So run through the first courtyard area on Normal, grab the target locator, and head outside. Target in the center at the bottom of the hill where the two Wraiths come out, and fire. If for some reason you don’t destroy both in one shot, just restart your checkpoint, and try again until you do. I’ve included this portion in the video at the start of the mission.



Restart the mission on Legendary difficulty. There aren’t any other miscellaneous achievements to worry about here, so just progress through the mission in whatever manner you see fit, or follow along with my video guide above. I based my path loosely on RC Master’s speedrun, but I obviously wasn’t nearly as perfect as he was and was just winging it at times. At mission completion, you’ll unlock the next story-related achievement for finishing on normal or higher.