Halo 3 achievements

Halo 3

4.2 from 23136 votes

There are a maximum of 79 Halo 3 achievements (49 without DLC) worth 2,620 (1,750)

260,842 tracked gamers have this game, 18,340 have completed it (7.03%)

Achievement Details

UNSC Spartan in Halo 3

UNSC Spartan20 (15)

Earn your Sergeant rating to be recognized as a true Spartan (Online).

  • Unlocked by 150,495 tracked gamers (58% - TA Ratio = 1.31) 260,842  

Achievement Guide for UNSC Spartan

101,689 (55,875)
Achievement won on 24 Mar 10
TA Score for this game: 2,620
Posted on 24 March 10 at 05:20, Edited on 06 April 10 at 03:37
This solution has 61 positive votes and 2 negative votes. Please log in to vote.
So, there seems to be some confusion(Myself including until recently). What you have to do is NOT get 20EXP overall. Bungie updated it who knows how long ago, and added in the playlist EXP thingy, so if you have 12EXP on lonewolfs, you should get it. If you have 12 EXP on Team Slayer, you should get it. If you have 12 EXP overall, then you will NOT get the achievement. Any questions, ask me.
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