Base screen is the main screen of the game. From here, player can build and upgrade structures, collect resources and enter different game modes.

Player vs Player fights and Base Raid mode (helicopter combat) are unlocked based on the Base Power, which is the sum of the powers of player’s buildings and survivors.

Survivors are characters, which can be placed in the buildings of your base. They provide different benefits depending on their class.
New survivors can be obtained by collecting their parts, which can be found in crates or received as a reward in the special events.