Subway - deprecated because quite the same mod "Surfaces_Caves" already exists https://mods.factorio.com/mod/Surfaces_Caves
Mods introducing new content into the game.
Counted when a user downloads a mod release for the first time. Before Nov 2021 it counted everytime a user clicked the mods download button.
Counted when a user downloads a mod for the first time. Has no data before Dec 2022