- last post: 01.01.0001 12:00 AM PDT
There's nothing inherent to Halo PC that allows you to use a headset, but there are a couple external programs that do.
Do a search for Teamspeak on Google. I think there is one other client that's popular amongst Halo players, but I'm not familiar with that one. I'll point out also that the Halo server you join has to be set up for Teamspeak (or have a different server that you can connect the Teamspeak client to).