Player Levels in World Zombination play a major part of the game. When a new player enters the game, they begin at level 1 and can level up by gaining experience.
Experience is gained through completing missions in the campaign and participating in Guild Raids.
On the Infected side the player's level determines the number of Drones at the beginning of each mission and how powerful they are.
Guilds also level up and unlock Perks at each level.