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You can play this games on your browser, also free. Good for spending time.

Six Sided Streets by Chris Klimowski

You try to expand your city from a city center in the middle of an island. Each turn, the game gives you city pieces that resemble puzzle pieces. Your goal is to build the largest city possible.

Link: https://csklimowski.itch.io/six-sided-streets

Konkr.io by Embair

Entertaining game, you start a small land and expanding to merge your cities and gain more gold. Also has an economical mechanic, you can use this for bankrupt your rivals, but also you bankrupt also.

Link: https://embair.itch.io/konkr

You can clone this GitHub repository to create a server. Setup instructions can be found on the repository's main page.