Firefight: Alpha Site is an achievement in Halo 3: ODST. It is obtained by scoring over 200,000 points during a Firefight match on Alpha Site. It is worth 10 Gamerpoints.
This achievement is represented by an olive square with the ONI insignia on it.[1]
When doing this on single player, allow a minimum of 2 hours to reach 200,000 points.
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