The goal is to kill a certain amount of enemies as fast as possible. Its really important to be efficient. Its important to note in endurance zombies will spawn as you move further from the start, but they also get harder. -I personally try to get a lot of kills from 100-500 distance region because it is really easy to kill a lot of zombies fast. -A lot spawn in the flat sand regions too it seems, but there is a lot of RNG here. -you should do the bullet glitch to have unlimited ammo -It is possible to manipulate a monster spawner to get a lot of kills. -go for the head when close, try not to use your knife unless you really have to.