A Monument to All Your Sins

A Monument to All Your Sins is a Campaign Achievement in Halo: Reach. This achievement is awarded when a player completes every campaign mission in Halo: Reach on Legendary alone, with no outside help. It is represented by a compressed drawing of the Legendary symbol.

Trivia

 * The achievement's name is derived from a quote from the Gravemind; "I? I am a monument to all your sins."