Take the 2-minute tour ×
Arqade is a question and answer site for passionate videogamers on all platforms. It's 100% free, no registration required.

Lets say I install a Minecraft mod which adds new blocks and items. I then update to a newer version of Minecraft, which does not have these new blocks.

How does the game handle maps with what are now unrecognised items in inventory, unrecognised items in chests, and unrecognised placed blocks?

share|improve this question
add comment

2 Answers

up vote 6 down vote accepted

The world will just generate with air blocks replacing non-vanilla blocks, and your non-vanilla items will just disappear. Re-installing the mod will not bring the blocks or items back, unless you do so before loading the world again.

(As a side note, some mods used to render your world unplayable unless the mod was installed again, I'm pretty sure Notch fixed it though, but there might be a few that mess things up.)

share|improve this answer
add comment

The mod will make new item IDs, and items are stored by the item IDs. So, for example, I once had the portal gun and I updated the mod and I had a melon stem in one of my chests :). Any other items or blocks are just not there!

share|improve this answer
add comment

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.