Here is a guide for you to find all tower collectibles in Halo Infinite.
HALO INFINITE TOWER COLLECTIBLES
The Tower collectibles include 1 Mjolnir Armor Locker, 1 Banished Audio Log, 2 Spartan Cores, 1 Skull, and 1 UNSC Audio Log.
Below, we’ll go through them in (roughly) the order you’ll encounter them while playing the main story mission “The Tower.” We start on the ground and move up, floor-by-floor.
TOWER BANISHED AUDIO LOG 1 OF 1
LOCATION: GROUND FLOOR TOWER INTERIOR COURTYARD
Disable the hardlight door to enter The Tower, and walk through the corridor with two Grunts inside. That hallway ends at The Tower’s interior courtyard.
When stand at the hallway’s exit (or the courtyard’s entrance, if you prefer), the Banished Audio Log is inside the first structure directly ahead of you. (You can see the courtyard entrance door just above the part that says 36 on the AR in the image above.) Listen for the telltale beeping, if you’re having trouble locating it.
TOWER SPARTAN CORE 1 OF 2
LOCATION: GROUND FLOOR TOWER EXTERIOR, NEAR THE GRAV LIFT
The first Spartan Core in the Tower is on the ground near the grav lift — it’ll be easier to find it once the area is cleared out and the grav lift is active. Stand facing the grav lift, and look to the right. There’s an open container there with some guns and ammo inside. Cut through there and into the container to its left to find this Spartan Core.
TOWER MJOLNIR ARMORY 1 OF 1
LOCATION: GROUND FLOOR TOWER EXTERIOR, CLIFF NEAR GRAV LIFT
Before you ride the grav lift up, stay on the ground. Facing the grav lift, turn left. Head over the the edge of the cliff there, and look underneath the platforms on your right to find this armor locker.
TOWER UNSC AUDIO LOG 1 OF 1
LOCATION: TOWER INTERIOR, SECOND FLOOR
After you activate the grav lift and ride it into the Tower, you’ll pick up the Threat Sensor. Continue up to the second floor, and take a left. Continue around the corner a bit, and keep pinging your AI Scan (down on the D-pad). The UNSC Audio Log will be behind a column on your right.
TOWER SPARTAN CORE 2 OF 2
LOCATION: TOWER INTERIOR, THIRD FLOOR
On the third floor up, take a left. You’ll run into a (shielded) Brute and an Elite. Watch for this Spartan Core on your right (once they’re dead).