Relentless zombies will launch waves of attacks, the monsters will cooperate with each other, the battle will be harder and harder, you can use the drop Buff to temporarily improve the combat capability, or deal with the enemies by means of terrain. After each surviving, the settlement system will rank your combat performance: accuracy, headshot, injury, hit, etc. You should make good use of the precious breathing time between each wave to buy powerful equipment in the store, gather air-drop supplies on the battlefield, or collect the materials dropped from enemies. The higher the rating of combat, the more air-drop supplies and experience value you will get. What about the obsolete equipment? Don’t worry, the recycling machine on the battlefield can recycle the obsolete weapon. Even when you get some valuable materials, you can throw the obsolete weapons and materials into the recycling machine directly to maintain your funds operation.