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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Truth or Dare?: Betray Dare after completing all Vidmaster Achievements. -50G 3+4=7: Play 3 hours of Halo 3:ODST with 4 friends. -100G Sike!: Commit suicide after teabagging 7 enemies as Dare. -25G [Edited on 06.21.2009 7:06 PM PDT]