Quick answer
Collect the index in The Library mission on Legendary by navigating through enemy-infested areas, defeating tank farms and Needlers, and reaching the control room before the Flood spreads.
Guide briefing
Halo Campaign Evolved: The Library Legendary Walkthrough
Collect the index in The Library mission on Legendary by navigating through enemy-infested areas, defeating tank farms and Needlers, and reaching the control room before the Flood spreads.
Applies to
- — Halo Campaign Evolved on Legendary difficulty
- — Mission 7: The Library
- — Players seeking a full walkthrough with tactical tips
Target
Introduction and mission context
- Checkpoint
- Start of mission
- Landmark
- Mission start area
Do this
- 1Listen to the briefing about the Flood threat and the need to collect the index.
- 2Begin moving forward from the starting point toward the first door.
Confirmation
Introduction and mission context is available as described. This is the introductory sequence; no combat or collection occurs yet.
Target
Open first door by defeating enemies
- Checkpoint
- First enemy encounter
- Landmark
- Door with three regular enemies
Do this
- 1Run past initial enemies toward the door.
- 2Engage and defeat three regular enemies to open the door.
Confirmation
Open first door by defeating enemies is available as described. After opening the door, proceed to the next area where Spark will open another door.
Target
Open second door using Spark
- Checkpoint
- Second door before elevator
- Landmark
- Large group of enemies near Spark's door
Do this
- 1Run to the door that Spark needs to open.
- 2Allow Spark to open the door after reaching it.
Confirmation
Open second door using Spark is available as described. This door leads to the elevator; prepare for more combat afterward.
Target
Reach and board the elevator
- Checkpoint
- Elevator entrance
- Landmark
- Elevator platform
Do this
- 1Run to the elevator after the door opens.
- 2Board the elevator once it arrives.
Confirmation
Reach and board the elevator is available as described. The elevator contains a drone control subsystem failure; Spark will reset it shortly.
Target
Defeat tank farm to open final door
- Checkpoint
- Final door before index chamber
- Landmark
- Locked door with tank farm
Do this
- 1Approach the locked door after the bridge room.
- 2Fight and defeat the tank farm to unlock the door.
Confirmation
Defeat tank farm to open final door is available as described. With shotgun and needler, this fight should not be too difficult.
Target
Activate bridges in next room
- Checkpoint
- Bridge activation room
- Landmark
- Bridge control switches
Do this
- 1Enter the room with multiple bridges.
- 2Activate all four bridge switches while avoiding non-threatening enemies.
Confirmation
Activate bridges in next room is available as described. Only kill enemies with guns; others can be ignored to save ammo.
Target
Defeat enemies on elevator
- Checkpoint
- Elevator combat zone
- Landmark
- Elevator interior
Do this
- 1Engage enemies as they spawn on the elevator.
- 2Use shotgun and needler to eliminate threats efficiently.
Confirmation
Defeat enemies on elevator is available as described. Drones assist in combat; use them to help suppress enemy fire.
Target
Enter index chamber and retrieve index
- Checkpoint
- Index chamber entrance
- Landmark
- Index chamber
Do this
- 1Enter the chamber after the final door opens.
- 2Take possession of the index for transport.
Confirmation
Enter index chamber and retrieve index is available as described. Protocol requires immediate transfer of the index to ensure mission success.
Target
Defeat remaining Flood to complete mission
- Checkpoint
- Final combat area
- Landmark
- Final room with two tank farms
Do this
- 1Clear all enemies in the final area.
- 2Kill two tank farms while managing infinite spawns.
Confirmation
Defeat remaining Flood to complete mission is available as described. Shotgun is most effective here; keep moving to avoid being pinned.
Target
Complete mission and activate installation
- Checkpoint
- Mission completion
- Landmark
- Control room
Do this
- 1Reach the control room with the index.
- 2Activate the installation to complete the mission.
Confirmation
Complete mission and activate installation is available as described. The mission ends successfully upon activation; no further actions required.