OpenTTD - An open-source clone of the classic game ...
Escape From Paradise - Consider going on a luxury cruise to wind up stranded on a mysterious island in the center of the Pacific Ocean.
Simutrans - Simutrans is an open-source transport simulator.
Gemini Lost - Gemini Lost is an Action, Strategy, Single-player and life-Simulation created and published by PlayFirst.
Transport Tycoon Deluxe - Transport Tycoon Deluxe is a Business Simulation developed by Chris Sawyer and published by MicroProse.
The Paradise Cove - The Paradise Cove is playable, Action-Adventure, Casual, Building, Management, Massively Multiplayer Online, and RTS Simulation created and published by Pocket Games.