Halo 4 Weekly Challenges: 3.25.13CampaignComplete any Campaign Mission on Heroic or higher difficulty with the Cloud, Catch and Tough Luck skulls 10000 XP
Complete any Campaign Mission on Heroic or higher difficulty with the Cloud, Catch and Tough Luck skulls. Reclamation 30000 XP
Complete Reclaimer on Legendary difficulty with the Mythic, Tilt, Tough Luck and Thunderstorm skulls.Spartan OpsWatchful Avenger 20000 XP
Kill 60 WatchersKnightmare 10000 XP
Kill 15 KnightsWar GamesWe are the Champions 20000 XP
Win 20 matchmaking Slayer matchesDeft Hand 20000 XP
Earn 40 Combat Skill MedalsClick here to see a complete list of this week's Weekly Challenges.