Numantian Games has released a fairly significant update for their popular post-apocalyptic city management RTS, They Are Billions.

This latest update adds a level editor and full Steam Workshop support so players can easily make and share custom content.

Numantian Games also added a new scenario, The 50 Days Challenge, where players have 50 days to prepare for a massive swarm of zombies. You can read more about the update here.

They Are Billions is currently available for Windows PC via Steam Early Access for $24.99, and it’s currently 25% off. The developers are shooting for a Spring 2019 release date for the full version of the game.