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I have tried everything from using the slime finder app to the slime finder mod, but so no matter what I do no slimes seem to spawn.

I'm playing on normal difficulty, at layer 13 and I've made a 16X16X3 room; still nothing. Does anyone have any tips that I might have missed?

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marked as duplicate by kalina, Schism, waifu, kotekzot, OrigamiRobot Jun 2 '13 at 11:37

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

You know that slimes also spawn in swamp biomes, right? – MBraedley Jun 1 '13 at 21:09
How close are you standing to the spawning room? – SevenSidedDie Jun 1 '13 at 21:42

According to the minecraft wiki, this is there spawn routine:

  • Slimes naturally spawn in underground caves and on the surface of Swamp biomes during the night (or superflat worlds)
  • In swamps, slimes may spawn at night. They spawn most often on a full moon, and never on a new moon. This can make gathering slimeballs difficult, as it takes over two hours for the moon to cycle.
  • They spawn throughout underground caves below level 40. They spawn randomly in 1/10 chunks

I suggest you read up on the wiki, as there are methods for farming them aswell. Good Luck!

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Well, you could try to find a swamp biome; they always spawn there and that is a good spot to look. That would be your best option, unless you want to cheat.

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