Each player is represented by an in-game avatar, and players interact with others through the avatar. Players could modify the avatar by crafting and wearing armor from defeated Zeds.
Zeds are the soul of this game. There are multiple types of Zeds and even mythical ones. When you encounter Zeds, there are two options of action you can perform:
(1) capture the Zeds and subdue them and let them fight alongside you in your quest, or
(2) defeat the Zeds for loot drops for other benefits such as crafting armour's, weapons, or sell them.