DJ Artyom - 30
On the level "Outpost" reach the radio tower and broadcast the commander's message.
As you make your escape from the Nosalises on "Depot" you will find your way through to "Defense". Here you will need to help defend a friendly station. Once you help the soldiers the commander will talk to you, then give you a tape to broadcast. Take this tape through to "Outpost" and climb to the roof of the building you need to pass through. Play the tape using the radio and tape player.
Remember to take the tape from the commander, he will place it on the floor. Press to collect the tape and proceed through to "Outpost".