After you wake up, you will receive a knife, and after a moment's exploration of the village, you will also receive money for guns. Enter the General Store in front of you. Once inside, buy Colt 1911.
Equip your weapon and follow Dennis, to exit the village. At the other side of the road, you will find a path to the peak with the Radio Tower on it. Follow the path to the very top. You can access the mast through the hole in the fence, to the right.
Right before you step on the stairs, kill a snake. To the left, there are two crates that you can examine. After you reach the top of the mast, destroy the coder device inside the box . To the right of the box, there is a zip line that you can use to get back down to Dennis.