Since there is no confirmation on what the achievements will be for the game, aside from the time being, let's create our own!
Here's some of mine:
"KEEP IT CLEAN - 10 GS: destroy all environmental objects within the city."
"Terminator - 50 GS: Never use a health pack"
"Ray Charles? - 50 GS: Never use the low-light mode, VISR"
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Im thinking of a few such as: Covenant armada- Kill 777 covenant in campaign/Fire Fight modes. Lucky Number Se7en- Get 7 headshots in a row Grunts birthday- Kill up to 70 grunts Steaktacular- Get 7 Luke Owes U A Steak Dinner's The Health Nut- use 50 healthpacks The Beast Within- Go an entire level no weapons, or health packs, JUST YOU AND YOUR FISTS Simper Fi- you and a team mate go through 7 covenant swarms on heroic. Pistolero- Using only the pistol and beatdown go through 17 swarms (Heroic and up) Septa Killer- introducing the 7 kill killing spree those were just spitballin it notice my seven refences to the number 7 i tricked you out if you are true bungie fan you will see what i mean lol