No Witnesses
From Halopedia, the Halo wiki
No Witnesses is an achievement in Halo 5: Guardians, awarded for destroying the Phantom at the Covenant camp in Reunion on Heroic or Legendary difficulty.
Strategy[edit]
After clearing the first group of Covenant, climb the rocks on the right and turn around to enter a long alcove with a dead Marine and a Mission Intel data pad. In this alcove lie a Railgun and Rocket Launcher. Grab both of them before heading for the second group of Covenant where a Phantom will appear. After the player spots the Phantom (denoted by John-117 saying "More hostiles. Ready up."), the Phantom will hover in mid-air for several seconds before taking off and disappearing. While the Phantom is visible, pound away at it with the Rocket Launcher and Railgun, making sure that the rockets lock on to the Phantom. Four rockets and two or three Railgun blasts are enough to destroy the Phantom. Alternatively, the Fuel Rod Cannon that can be found on a ledge across from the alcove with the Railgun can serve as a substitute. However, the player should also be careful of any Kig-Yar Snipers in the distance as they can easily down the player, especially on Legendary difficulty.
A viable strategy for destroying the Phantom early enough before it takes off is to pick up both the Railgun and Rocket Launcher from the alcove, climb up the rightmost ledge while staying close to the wall on the right with the Rocket Launcher equipped, and slowly walk until the Phantom is visible inbetween the cliffs. Use Smart-Link to lock on to the Phantom, fire two rockets at it, reload immediately after firing the second rocket, and fire two more rockets. The Phantom will then explode after being hit with the fourth rocket. Should it survive, one or two Railgun rounds should completely destroy it.
On co-op, however, the Phantom can fly away much earlier than usual, making this achievement significantly harder, if not impossible to obtain on co-op. If attempting this achievement with at least two players, one of the co-op players should play as Kelly-087 as she has a faster weapon reload. One player must have the Rocket Launcher, while the other must have the Railgun. Since the Phantom flies away much earlier on co-op, it may be more preferable to attempt this achievement on solo play where the player will have enough time to destroy the Phantom before it can leave.
