Two Corpses in One Grave

Two Corpses in One Grave is an Achievement in Halo: Reach and Halo: The Master Chief Collection (with 'In' capitalised). It is awarded for destroying 2 vehicles at once with the Target Locator in the 3rd Campaign level, ONI: Sword Base.

Tips

 * A good way to get this achievement is when you exit the ONI Building, at the start, two Wraiths will drive into view. These often get close to each other.
 * Another way is that if you wait at Airview Base (the one with the AA Battery), two Ghosts will be dropped via Phantom.
 * If you are playing on the level where the two Wraiths appear after destroying a Warthog, and you are playing with at least one other person, then you can get that other person to take out the gunners in both Wraiths. And then take the turret on one, which makes the Wraiths "bump heads" and ram each other. This allows for an easy Target Locator shot (by another player or by the player in the turret by getting out of the turret, targeting the ground at your feet, and getting back in the Wraith turret) on the now entangled Wraiths, albeit at the sacrifice of the player who is in the turret.

Trivia

 * The achievement's name is a direct quote from the Gravemind, who said it twice.