Halo: Reach Credit Boosting "Grunt Punch, 'Nade Raid" Method
Start Nightfall on Normal. Walk normally until you get to just before the first elite that you assassinate, and wait a second for a checkpoint, here you can snipe this elite, reload, repeat for some commendations.
Once you are tired of that, continue on, kill all the first wave of enemies as fast as you can, prior to the ship coming in. Then, just before the ship can "land" get close to the right wall until you get a check point. From here, get a well placed nade below an elite / jackals, and then run left, and throw a few nades at the grunts on the left, down the hill. This should easily net you 10-ish grenade kills, and a bunch of multikills. Load last save, rinse, repeat.
This effects the following commendations:
Nice Arm
Super Solider
Walking Tank
Head Shots Commendation (If you do the possible boost at the start)
Leadership Element / Spec-ops (1st elite?)
There is nothing else once the screen goes black. OOPS, editing eff up. Happens to the best of us at 3am.
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