Halo 5: Guardians
73 Achievements
1,250
44-56h
Double Stuff
Simultaneously destroyed 2 cores in Guardians on Heroic difficulty.
10
0.36%
How to unlock the Double Stuff achievement in Halo 5: Guardians - Definitive Guide
If you're attempting this solo you can find a Rocket Launcher just in front of the Mantis then you can stand in between the Epsilon and Delta Core with a clear line of sight at both cores. Fire the first rocket at Epsilon and the second at Delta.
Difficulty: Heroic
Partway through the level you will reach a section where you must destroy many energy cores which are large blue balls with moving rings around them. You must destroy two within a 5 second window, and it is recommended that you do it using the first one you encounter and the next one up the hill to the left of that one. Kill all of the nearby enemies, and damage them until they are red. Now split up your team into 2 groups, and coordinate them to be destroyed at the same time. If you are in co-op, just time in, but if you are doing it solo, command the AI to destroy the core and immediately destroy the yours as the other one is destroyed. If you fail, reload the checkpoint.
Use a ground pound on the core to also unlock:
Since there are tons of videos here already, I'll describe the idea of what needs to be done.
After cleaning the area out of enemies on the two farthest cores from the way you first came from, start shooting - I used the Mantis' (giant robot) machine gun - the core globe until it glows purple and then carefully shoot a little more until it becomes red, then stop. Go to the other core close by and do the same thing.
Then, position/send your team back to the first one and highlight it () so that they'll start shooting it while you go and do the same on the other one. The explosions should happen almost simultaneously and it shall be good enough for the achievement to unlock.
Here is a playlist of guides for this game!
https://www.youtube.com/playlist?list=PL-HeW6XkKdUKnLea5sXbt...
This achievement must be done on the Heroic difficulty level or higher.
When attempting this achievement in a solo playthrough of the mission, you'll need to pick up the Rocket Launcher located just ahead of the Mantis near Alpha Core. With the weapon in hand, make your way through the valley and position yourself on the ledge that overlooks Delta Core. From here, you can turn around 180 degrees and see Epsilon Core in the far distance. Zooming in with your Rocket Launcher, fire a clear shot at Epsilon Core and then quickly turn around and fire a rocket down at Delta Core. If timed correctly, the achievement will unlock without fault.
If you're going for this achievement during a Co-Op playthrough, it'll be much easier to simply communicate with your partner as you both work on destroying two different cores with similar firepower (Ghosts, Ground Pounds, Fuel Rod Cannons, etc.). Either way, you can refer to the video guide below, provided by Pingy, for a visual representation of the solo method.