Below are all the collectibles found during the Repository mission in Halo Infinite.
Skull – Grunt Birthday Party
Proceed through the level until you receive Escharum’s message via cutscene. There will then be a bridge linking you to a room straight ahead.
Facing the doors to that room, look to the right of the terminal to find an area you can grapple to with another door. Grapple to that balcony and head through the doorway to find a power seed at the end. Return to the room with the bridge then grapple to the room across the way. Enter the door and on the right side of the room you’ll find a place you can put the power seed. Doing this deactivates a barrier further in the level that allows you access to the skull. Keep heading through the level until you come to the room shown below.
Grapple on top of the structure’s support beams to find the skull. Beware of the 4 invisible Elites that guard this skull. You can use the Threat Sensor to locate them.
UNSC Audio Log: Recovered Files
Obtained automatically as part of the story after a cutscene where you find out the truth about the Weapon.
UNSC Audio Log: The Prisoner
This log is found during the Repository mission. Proceed forward until you reach a large room where you learn the truth of the Weapon. After the cutscene, follow the path left until you end up in a storage room. The log is located on the table in this room next to a hologram of Zeta Halo.