OpenTTD - An open-source clone of the classic game ...
Simutrans - Simutrans is an open-source transport simulator.
Railroad Tycoon - Railroad Tycoon is a very first installment in the series of Railroad Tycoon that was released in 1990 developed by MPS Labs and published by MicroProse.
TheoTown - A City simulation game with great nostalgic graphics.
SimCity BuildIt - Build, craft, and control! SimCity BuildIt is an all-new SimCity game designed just for mobile.
OpenRCT2 - Game engine recreation of RollerCoaster Tycoon 2 adding new features.