So I don't want to spoil anything, and I don't know how much of this there is to spoil, but last night I was wearing _good_ headphones while playing (so as not to wake my housemate).

There are the normal near-term voices saying things like "almost out of ammo", but if you listen to the very-far-away voices...

I was playing medic, I don't know if the things they say vary by what class you are playing though. I only noticed two or three exchanges as I was busy fighting...