an Awesome update now even harder:

This is just my update i have the older version and the Adventure starts.

Story:

Your the player and you live in one Block but there was a chest under it you need to open it and in the chest are ice and a lava bukkit and more stuff you start saying how well i make a land if there is a chest in minecraft if you jump and want to place something on top of the chest it does not work.
so you hold shift then you see Bedrock then you start placing blocks so you can survival and always hold shift in some edges.
but there is a sapling so you start to grow a tree with bone meal and there is 14 obsidean then you ask your self why did i make this map if theres no monster to get monster you must extend the land.
Thanks for reading.
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Update:
now one you start you see on top there is grass!

and i added grass blocks

nether even harder/nether is one block!!

lots of Creepers may spawn

endermen dont show up at most of the days in Minecraft

bunch of new stuff in the chest in nether and land

removed from chest from the land 1 bone meal and more...
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older versions:

http://www.planetminecraft.com/project/one-block-survival/

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achievements:

Make a land

Grow a tree

Get a sapling

Make a cobelstone generater

make a long land

kill your first monster
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Nether achievements:

Find the chest

make a long land in the nether.

kill your first monster

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more land Achievements:

Time to farm

Enchant your items

make a home so the monsters wont kill you/make a shelter