Yeah, it's 66K, if I recall correctly, to get from WO Grade 3 to Captain, and it may be because of the achievement, other than that, I have no clue. --- I am Alpha and Omega, the beginning and the end.
Yes, the credit requirement is lower. Warrant Officer Grade 3 to Captain takes 66,000 cR, which makes it the longest rank-up in the game (currently). The other Warrant Officer rank-ups take 33,000 cR. Getting to Lt. Colonel takes 50,000.
This is presumably because the achievement is at Captain, so Bungie wanted players to have to actually "try" to reach it.
From: Protoman_X38 | Posted: 9/27/2010 9:54:27 PM | #008 I is just me, or does 66,000 credits not really seem like that much?
It is. Once you've exhausted a lot of your commendations you basically come to rely on daily/weekly challenges as your main form of credit gain. --- http://www.backloggery.com/fridgebeard It ain't no secret I didn't get these scars falling over in church.