In any hostile game, you can adjust how many mobs are brought into the play. Three factors are how many spawns in, what biome it comes from, and nerfing or buffing the mob’s XP rate. These guide five ways to change the mob spawn rate in Minecraft.
How to Change Mob Spawn Rate in Minecraft by Switching Frequency
There is an option in the on-screen menu which allows you to change this setting. found under “settings” -> “Mobs & Spawners”. You can toggle between farming and normal modes, changing the spawn rate for both biomes and mobs. The farming mode will make it so that only animals spawn easily, while the normal mode will make hostile mobs as common as any other animal.
Note: Within the “Mobs & Spawners” panel, you can change the spawn rate of hostile mobs. This setting is more effectively used in combination with the “max-age” and “spawn ticks” settings found under the “Game Rules” panel.
Spawning in Hostile Animals
You can toggle which chunks of land will have hostile mobs spawning. Found in the same Mobs & Spawners panel under the “Creative Mode” tab. When this setting is enabled, hostile mobs will only spawn where there isn’t already an animal or villager around. For example, you can use this to make a jungle biome where you don’t have jungle creepers spawning (commonly hostile mobs) without having to deal with cactus mobs and other such creatures in the jungle.
Note: This setting is not “true” hostile mob spawning. It only changes where mobs spawn to animals, and it doesn’t change the number of hostile mobs that will spawn in the game. If you want more details on changing the number of hostile mobs, read below.
Update: 9/25/2013: A new update has modified how mob spawning works. You can change the max age and number of spawn ticks now through the game rules tab found under “Settings”. Mob XP can be boosted or lowered by altering the XP table under “Game Rules”.
How to Change Mob Spawn Rate in Minecraft with Max Age
“Max age” is a technique used to make hostile mobs rarer worldwide. When this setting is changed, mobs will not spawn so often (or at all) until they have aged to the point that they no longer count as a “baby”. Effectively reduce the number of hostile mobs in a small area without needing to change their spawn rate or dilute them with animals.
You can alter this setting through the “Game Rules” tab under “Settings”. You can change it on both an individual basis and globally.
Changing Mob Spawn Frequency
There is an option in the on-screen menu which allows you to change this setting. Found under “settings” -> “Mobs & Spawners”. You can toggle between farming and normal modes, changing the spawn rate for both biomes and mobs. The farming mode will make it so that only animals spawn quickly, while the normal mode will make hostile mobs as common as any other animal.
Changing the Number of Hostile Mobs
A checkbox in the on-screen menu allows you to change how many hostile mobs will spawn per chunk of land. This setting is altered through the “Game Rules” panel under “Settings”.
These Five techniques have a lot of potential for altering how hostile mobs are in a particular area. You can use all of these to create a more fun world. When balancing the number of opposing groups, remember that some evil creatures have particular features that distinguish them from other animals and monsters. For example, spiders and zombies are slow initially but gradually increase in speed over time, making them particularly dangerous. Zombies also spawn with armour in their inventory to withstand more damage than some animals. It is essential to consider such facts when deciding how many hostile mobs should be allowed in an area.