First of all, you need to make your level (in the level editor) After the level has been made, go to the "FILE" tab on the top, and hit "Share Map" As easy as that!
Downloading others creations
To download custom levels, go to Steam's Workshop. Find a level you would like to download, and hit the "subscribe" button. After this, launch your ZKW-Reborn, and Steam will automatically load the level for you! You should then get a notification from ZKW that it has downloaded the map successfully. If not, just try to relaunch your ZKW, or Steam!
Remember to run Steam as Adminstrator (and ZKW) if you're having any problems.
How to update existing map?
At this point, you can't. It is recommended to upload your map with a slightly different name (for example. "My Map Version 2") and delete your old map (if you wish to do so)
Version 1.1.8 with Workshop support!
-Steam Workshop is now supported!
-General improvements for the level editor.
-Overall adjustments for the game
-Cloud saving has been improved (this should get rid of the random error)
Version 1.1.75 on Steam!
-New chat menu for PC. Now you can talk to your friends and plan your Zombie busting strategies easier.
-Improved HUD elements
-Improved font in menu. Much easier to read even with out glasses!
-Added ability to take screenshots with Steam. Show off your best Zombie apocalypse action to the world.
-Slight adjustments on online multiplayer. Miscellaneous tweaks to make your gaming experience even better.
-Tons of general small bugs fixed.
Let me know about your experiences and how we can improve the game even more.