This page of the Halo Infinite guide contains a walkthrough of the 13th main mission - Repository. The following walkthrough explains how to locate the information relay, how to solve the grav lift puzzle and how to reach the surface of the ring.
Locate the Information Relay
Start your journey through the Repository, which will entails further battles that Master Chief will have to face. At the beginning, you will be attacked by new sentinels: flying machines. Again, weapons that shoot a large beam of energy will be a good choice here.
You can't go to your destination as the crow flies; you have to choose side corridors. Finally, you must reach the terminal to access the relay.
Reach the surface of the Ring
After watching the cutscenes, go to the new exit, at which enemies appeared. This time, expect to encounter new Banished as well.
On your way, you will pass a large window, behind which you will see a ring. Keep going further until you reach the room with the terminal, which you will use to activate the grav lift.
On the new floor, you have to fight some more battles. Larger clashes will take place in the hall with two inactive devices. Their activation requires 2 Power Seeds and because of that, you must first examine the side passages on both sides of the room (in any order).
While exploring the side passages, use ramps leading to the lower levels. Each of the seeds is guarded and you have to fight the following enemies:
- an elite Banished with a huge melee weapon - better keep him at bay,
- the elite Banished with heavy weapons - attack them while hiding behind cover and consider setting up a drop wall.
Once you pick up a power seed, you don't have to go all the way back to the top because teleporters will appear in the rooms. They allow you to instantly return to the first room.
After placing both power seeds in the slots, the grav lift will be activated and you can use it immediately.
On the new floor, you can collect supplies and reach Photo Lock terminal.
Watch the cutscene, defeat the Banished and use the next passage. The next fight should not be demanding. Finally, you must reach the room with the next terminal. Using it will allow you to reach the exit to the surface and the next main mission, The Road, will automatically start.