Halo Nation


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Legendary All Skulls On (LASO) is a fan-created difficulty that requires setting the difficulty to Legendary and activating all skulls.[1] Solo LASO (SLASO), also known as Mythic difficulty, is LASO with only one player. The Iron skull forces the player to complete the mission with zero deaths or saves. LASO is possible in all post-Halo: Combat Evolved Halo FPS games.



  1. - Halo 3 Mythic Walkthrough by the Tyrant
  2. - All Halo 4 Emblems

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