Halo 5: Guardians
73 Achievements
1,250
44-56h
Preying Mantis
Completed Swords of Sanghelios co-op with both Mantises on Heroic difficulty.
10
0.49%
How to unlock the Preying Mantis achievement in Halo 5: Guardians - Definitive Guide
This will happen midway through the mission. You will clear an arena and then an Elite will drop Mantis for you.
The easiest thing to do is to take turns. One goes out, targets, launches missles, and falls back to recharge shields while the other teammate moves forward and attacks.
Keep leapfrogging like this, and you'll have it in no time.
I reloaded the checkpoint immediately, then we mopped up, walked into the last building (with the Arbiter inside) at the same time, took opposite staircases, and met at the top (outside the room with the Arbiter) at the same time. We then walked in on the Arbiter doing some nasty things at the same time.
We also had the two people without mantises (one was an A.I.) stay outside in their wraith, not entering the final building with the Arbiter at all.
*Achievement popped*
What to do: 2 players enter mantis and meet with arbiter simultaneously.
What to avoid: Abandon mantis, destroy mantis, let players without mantis meet arbiter.
Here is a playlist of guides for this game!
https://www.youtube.com/playlist?list=PL-HeW6XkKdUKnLea5sXbt...
Hope this helped! Remember, just let the mantises meet up with the arbiter and not the walking players.
This achievement must be done in Co-Op Campaign and thus requires an online connection. The difficulty must also be set to Heroic or higher.
Towards the end of this mission, Fireteam Osiris will finally link up with a few members from the Swords of Sanghelios and be granted access to two UNSC Mantises. Once the mechs have been deployed, you and your Co-Op partner will need to hop inside the Mantises and pilot them towards the Arbiter’s location in the Elder's Council Chamber.
The Mantises have two modes of firing: the mounted machine gun on the right hand and the guided missile launcher on the left arm. Using your firepower, blast your past the Covenant enemies through the canyons and make sure to fall back if and when your shields are low. If either of the Mantises gets destroyed during this segment of the mission, revert your checkpoint. Once you have reached the Arbiter’s location with both players still piloting the Mantises, the achievement will unlock.