20 Rooms is actually an old map that I created called "20 Rounds," but the old map was completely unplayable and you couldn't even finish it because some of the rooms were broken. So after a couple years, I decided to go back to 20 Rounds and make it into a playable challenge map.

The map features 20 rooms that present different challenges varying in difficulty.
The end goal is to escape the 20 Rooms and survive.

All the Rooms are now repolished and the entire map can be completed with 0 deaths.

Enjoy the map and please leave suggestions or problems you find with the map.

EDITS:
Placed pressure plates in certain rooms so you can access the needed items just in case you missed them.
Fixed a command block at the end that wasn't working.
Removed the Mediafire download link.
Made room 12 harder because I thought it was too easy.
Change a sign that still read "round."
Added a timer to the map so you can see your time at the end.
Hid the command block output.
Made it so the dispensers in room 13 turned off when you leave the room.
Fixed a problem in room 9 where flipping the lever to fast would cause the room to become impossible.
Placed a chest before room 11 that contained the ladders so they couldn't accidentally be left in the top chest.
Updated the map to work on 1.13.2 and did minor changes to some rooms.