Lone Wolf Legend

Lone Wolf Legend is an achievement in Halo 4 and Halo: The Master Chief Collection. It is awarded when the player completes Campaign solo on Legendary difficulty. In Halo 4, the achievement is worth 90 Gamerscore and is represented by a howling wolf inside a circle. In Halo: The Master Chief Collection, the achievement is worth 20 Gamerscore, and is represented in the Steam icon by a human skull in front of crossed swords and the difficulty shield, and concept art of Requiem in the Xbox art.

Trivia

 * The achievement's name is a possible reference to SPARTAN-B312, the protagonist of Halo: Reach, who was identified as a "lone wolf".
 * The howling wolf featured in the achievement icon resembles the multiplayer emblem "Wolf" from Halo 3, Halo 3: ODST, Halo: Reach, and Halo 4.