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widelands
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.
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InfluxDB
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Settlers is a good rec. There's a free Settlers 2 clone called Widelands (https://www.widelands.org/) if you want to check it out. It's a little opaque, but it's definitely low effort if you turn off opponents and just play it as a builder.
NOTE:
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