Undead City: Ark Gun Idle is a free, action-packed game. You will become the world's top-ranked zombie shooter as you play this action-packed game. 

The zombies are on a mission to take over the world and it is up to you to stop them. Your mission is to kill all of the zombies and bring peace to the world.

To accomplish your mission, you will need to upgrade your weapons, build new weapons, and use different tactics.

You will have a variety of missions, including survival, killing, and gun shooting. The gameplay is very simple and fun.

This game is very easy to play and it will be a lot of fun for you.