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Mission 01: Osiris
Halo 5: Guardians

Mission 01: Osiris

Complete walkthrough for Mission 01: Osiris in Halo 5: Guardians. Find all Mission Intel, Skulls, and Unique Weapons with our guide.

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Complete walkthrough for Mission 01: Osiris in Halo 5: Guardians. Find all Mission Intel, Skulls, and Unique Weapons with our guide.

Walkthrough
  1. 1
    Begin by moving forward to clear the crash site survivors. Look for Mission Intel [01/07] near crates to the right. A weapon rack offers a Storm Rifle or Plasma Pistol.
  2. 2
    Follow the icy path along the cliff edge. Engage Covenant and Promethean forces, using the raised ledge and platform for a height advantage.
  3. 3
    Proceed into the icy cave, eliminating any Crawlers.
  4. 4
    Encounter Promethean Soldiers who will teleport away. Follow them up ledges into a man-made tunnel. Find Boltshot and Suppressor weapons.
  5. 5
    From the tunnel entrance, look back into the previous room. On the right-hand wall, find a narrow ledge leading to a Unique Weapon [Suppressor ‘Open Hand’].
  6. 6
    Return to the tunnel and use Spartan Charge to break through the ice wall.
  7. 7
    After breaking the ice, deal with the Soldier. Move forward until you see the cliff on the left. Look down to find a small platform with Mission Intel [02/07], a dead Elite, and a Covenant Carbine.
  8. 8
    Continue along the path. The path splits; order teammates along the upper path while you take the lower ledge to flank enemies.
  9. 9
    After clearing enemies, more Soldiers and Crawlers will appear. The ledge to the right leads to an icy ledge with a Light Rifle. The ground area has cover and enemies. A lower zone to the left leads to a guarded doorway.
  10. 10
    Destroy a weak wall below the icy ledge to flank enemies guarding the doorway. Continue using raised ledges for vantage points. The highest ledge to the right of the target doorway contains Mission Intel [03/07].
  11. 11
    Clear all Soldiers to proceed. Before entering the doorway, find the IWHBYD Skull by jumping onto a barrier shield near the doorway's left side and then up to the raised ledge overlooking the cliff.
  12. 12
    Enter the doorway and use Artemis scan. Jump to the ledge above and interact with the panel to open the door below.
  13. 13
    Exit the door into an icy cave. Head towards the opening overlooking a cliff. Look down to the right for a small ledge with the Unique Weapon [Scattershot ‘Loathsome Thing’].
  14. 14
    Follow the icy cave left. Drop down and look on a raised ledge ahead for Mission Intel [04/07]. Hop back up and continue to the exit.
  15. 15
    The path splits again: one leads up to a raised section towards a temple, the other to ground level.
  16. 16
    Engage the initial small group of Covenant forces.
  17. 17
    If playing on Heroic or higher, you can earn the Achievement 'Enemy of my Enemy' by helping an Elite. Take the upper path to the right and destroy Soldiers and Crawlers in his path.
  18. 18
    Continue against Promethean Soldiers and Crawlers. Use a weak wall on the left-hand platform to reach an upper ledge and eliminate enemies. Use weak walls at ground level to flank.
  19. 19
    At the left-hand turn, the temple entrance is visible. Soldiers man turrets on either side of the entrance, with more Soldiers and Crawlers at ground level.
Tips
  • Finding the first piece of Mission Intel earns the Achievement ‘Conspiracy Theory’.
  • Finding the first hidden Skull earns the Achievement ‘Gravedigger’.
  • On Heroic difficulty or higher, assist the Elite to earn the Achievement 'Enemy of my Enemy'.

Collectibles:

  • Skulls: 01 (IWHBYD Skull)
  • Mission Intel: 07 (Found at locations 01-04 in this mission)
  • Unique Weapons: 02 (Suppressor ‘Open Hand’, Scattershot ‘Loathsome Thing’)

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