Pure tower defense: progress by killing biters, dense nest placement, periodic waves with bosses, Master Ammo Chest system. Based on 'tower-defense-evolution' by i.am.mack & TCentral (modified version).
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