Widelands is a free, open source real-time strategy game with singleplayer campaigns and a multiplayer mode. The game was inspired by Settlers II™ (© Bluebyte) but has significantly more variety and depth to it.

Since the release of Build 21, developers implemented several hundreds of new features and bugfixes; for example, to name just a few of the highlights:

A new tribe: the Amazons
An add-on system
A third frisians scenario
Dynamic tribe loading to speed up game loading
Targeting individual map objects for removal
Mute/unmute messages by buildings
Fully redesigned main menu
Configurable keyboard shortcuts
Enhanced keyboard and mousewheel support in the UI
Long-term stable Lua API for game content designers

https://www.widelands.org/