This is a small map. I called it the 'Aztec Challenge'. It involved some challenging rooms that should be possible to complete. I saved the map while in Creative mode next to some instructions

You can find videos of this map Video 1

My old world is not working, possibly corrupted, here is its replacement.

This is my first map. This arena can have as many players as needed. You can also use clay soldiers. No mods are required

You are in a mysterious city... Populated with nothing but Zombies and Spiders!
You must Survive and thrive!
Rules:
1. No Leaving the valley!
2. No Mods!
3. No Breaking blocks, You May only Break vines, Torches and Chests
Achievements:
1. Kill 50 Zombies
2. Kill 50 Spiders
3. Find EVERY Chest
4. Claim a House to live in
5. Kill a creeper in the Upper Mines
6. Collect 100 arrows
7. Eat 5 Spider eyes While in Combat
8. Find an entrance to the sewers
9. Sleep in Beds 5 Times
10. Make Base in the Sewers
11. Fall into the Ravine and Survive, Then Escape Unharmed!
12. Stand on top of every house at Least Once!

3 Guys one Pit