7. The Library
The infamous mission, remade - four floors of Flood
Mission Flow
- Follow 343 Guilty Spark through the Library, floor by floor (four levels)
- Hold out against Flood waves at each elevator and door
- Claim the Index at the top
At a Glance
- Enemies: Flood only: combat forms, carrier forms, infection swarms.
- Typical length: ~45-60 min
- Collectibles: 3 skulls, 1 terminal
Skull Locations
TiltDamage multipliers increased both ways
On the platform where you first meet the Sentinels (top of the ramp platform left of the door where Guilty Spark appears).
PopShooting Flood weak points makes them explode
In the area after the elevator ride down - one of the easiest finds (platform-hop through the Flood-heavy room).
FamineWeapons dropped by enemies carry half ammo
On floor four, when the "Tools, Guns, Keys to Superweapons" title appears: through the door, immediately look right.
Terminal
Tangent III
Take the left door out of the Guilty Spark room, then blast through the Flood growth blocking the passage. See all 13 terminals and their lore →
Legendary Tips
- Never hold a corner - keep moving, and run shotgun plus the rocket launchers that drop along the way (community).
- Sprint (new to the remake) lets you skip chunks of the endless-spawn stretches.
- The remake reworks pacing, wayfinding, and encounters - but reviewers still call it the weakest mission, so set expectations.
Attempting LASO? Read the 17-skull LASO guide first.
Sources: skull locations cross-checked from DayOne, Push Square, and TheGamer guides (July 2026); terminals from Halopedia and Pure Xbox; remake changes from the official PlayStation Blog feature. Tips marked (community) come from player reports and may predate patches. Mission lengths are estimates. Last updated July 28, 2026.