It's probably been a minute since you thought about Kingdoms and Castles (opens in new tab), a well-liked indie city builder that released in 2017. Well, think again, because Kingdoms and Castles just got a big ol' free update adding a host of new stuff. Perhaps most shockingly, what was previously a lonesome survival game now has AI Kingdoms for you to trade with, engage in diplomacy with, and battle.
There's a whole host of other things added as well: Sea gates for protected harbors, a fog of war system, siege equipment, transport carts for resources, new happiness buildings, a minimap, exploration ships, and masons to upkeep your buildings.
Back around launch our Chris Livingston called Kingdoms and Castles "fun and breezy" which as a genre enthusiast I think is just about perfect. It's the lowest-key, highest fun of the colony builders, made to entertain rather than challenge. Except that's now not so true! There's a new survival mode that's pretty brutally hard.
You can find Kingdoms and Castles on GOG (opens in new tab), itch.io (opens in new tab), and Steam (opens in new tab).