Week 27: Clear Eyes, Full Hearts - Win 50 games in multiplayer Matchmaking this week. 7777 cR
Week 28: Tip of the Spear: LASO - Complete Tip of the Spear, Legendary, All Skulls On (LASO). 13000 cR
Week 29: Dedication/Time - Complete 24 Daily Challenges this week. 18000 cR
Week 30: Long Night of Solace: LASO - Complete Long Night of Solace, Legendary, All Skulls On (LASO). 14000 cR
Week 31: Not Lough, High - Earn a score of 80,000 in any mission in the Reach Campaign. 7777 cR
Week 32: Exodus: LASO - Complete Exodus, Legendary, All Skulls On (LASO). 15000 cR
Week 33: Endure: The Return - Complete four sets on any Firefight map in co-op play on Heroic or harder. 10000 cR
Week 34: Alexandria: LASO - Complete Alexandria, Legendary, All Skulls On (LASO). 16000 cR
Week 35: Best Served Cold - Take your Revenge on 77 enemies in multiplayer Matchmaking. 7777 cR
Week 36: The Package: LASO - Complete The Package, Legendary, All Skulls On (LASO). 17000 cR
Week 37: Not in the Face - Complete any Campaign mission on Heroic in 15 minutes with Black Eye on. 9000 cR
Week 38: The Pillar of Autumn: LASO - Complete The Pillar of Autumn, Legendary, All Skulls On (LASO). 17777 cR
Week 39: All in a Week's Work - Kill 1000 enemies in multiplayer Matchmaking this week. 15000 cR
Week 40: That's Dedication, Holmes - Complete 150 games in multiplayer Matchmaking this week. 10000 cR
Week 41: Ride the Wave - Complete 150 Waves in Firefight Matchmaking. 12000 cR
Week 42: Fleet Feet - Complete any Campaign mission on Legendary in 12 minutes or less. 10000 cR
Week 43: Your Daily Dose - Complete all of the Daily Challenges for a given day. 7777 cR
Week 44: Exodus: LASO - Complete Exodus, Legendary, All Skulls On (LASO). 15000 cR
Week 45: Like a Record, Baby - Complete 75 Rounds in Firefight Matchmaking. 8000 cR
Week 46: This Is How We Do It - Complete 9 Campaign missions on Heroic. 10000 cR
Week 47: Clear Eyes, Full Hearts - Win 50 games in multiplayer Matchmaking this week. 7777 cR August 1-7, 2011
Week 48: Ride the Wave - Complete 150 Waves in Firefight Matchmaking. 12000 cR
Week 49: Ride the Wave - Complete 150 Waves in Firefight Matchmaking. 12000 cR
Week 50: Best Served Cold - Take your Revenge on 77 enemies in multiplayer Matchmaking. 7777 cR
Week 51: Co-op Dash - Clear any Campaign mission on Heroic, in co-op, in 9 minutes or less. 30343 cR
Week 52: The Pillar of Autumn: LASO - Complete The Pillar of Autumn, Legendary, All Skulls On (LASO). 17777 cR