Hail To The Chief : Beat an entire mission without using a health pack. (50) Is it a spider: Kill three covenant with 1 Plasma Grenade (25) Scrapped By: Beat Campaign on Normal (75) Stone Puller: Beat Campaign on Heroic (100) Living Legend: Beat the Campaign on Legendary (125) ODST: Land In New Mombassa (5) No-Scope: No-Scope 5 Brutes in 1 flashback. ( 15) Past,Present, and the Future: Beat a flashback (20) The Real Slim Shady: Complete 75% of the Campaign in Lowlight/VISR mode. (50) Lot to live up to - Destroy a Scarab (if there is one) (50) Fight fire with fire - Beat 5 FireFight rounds (5) That's all I have. It totals up to 500. I hope you guys consider some.