Shootin' and Lootin' (1000 cR)- Kill 100 enemies in any game mode in Reach.
Covenant-cide (1000 cR)- Kill 90 enemies in Firefight Matchmaking.
Streaky Shooter (1200 cR)- Earn 10 sprees in Multiplayer Matchmaking.
Cook 'Em, Clean 'Em (450 cR)- Kill 10 enemies in multiplayer Matchmaking while you're jet-packing.
Weekly Challenge: Like Mike (2000 cR)- Finish a multiplayer Matchmaking game with at least 30 kills.
Total (excludes Weekly)- 3650 Credits
Today is alright. Doable, if nothing else. Shootin' and Lootin' is the easiest, you'll get it through the other challenges, or just play some Campaign or play on Forge. Covenant-cide is also pretty doable. Just go play a few games. I recommend Rocket-fight or Sniper-fight, because you get several when they jump out of the ship. Streaky Shooter will be easy for some of you and a pain in the arse for others. So, for those who will have difficulty with sprees, I think the best way is to play Juggernaut. Just kill everyone with it, and you should get both a Killing Spree and a Hammer Spree. But if anyone has any other ideas, let us know. For Cook 'Em, Clean 'Em, just remember to be actively pressing LB when you kill them, otherwise it might not count. For the Weekly Challenge, I'm honestly not sure of a 100% way to do it. You can always play on Team Slayer, and hope you get lucky. On balance, though, this might work. If you ever get put in a Rally game (God forbid, they're horrible), you might want to try killing the other racers. The score isn't bases on kills in the game, but they gave you an Assault Rifle for a reason, didn't they? I don't know. It would definitely make you a few enemies. Well, good luck with these guys!