Overheard

Overheard is an achievement in Halo: The Master Chief Collection. It is awarded for activating the eighth Halo 3: ODST Audio log on Mombasa Streets. The achievement is worth 5 gamerpoints and can be unlocked on any difficulty.

Location
The achievement is awarded when the player unlocks their eighth terminal, regardless of which terminal in the hub that is. For terminal locations, see here.