From LQWiki
Simutrans is a transportation and economic simulation game. Somewhat simliar to Transport Tycoon Deluxe and OpenTTD. Its license is non-free (but free-as-in-beer). The normal version uses 64x64 pixel tiles , but there's also an more detailed 128x128 graphic set available. There are also several addons available (like more vehicles, extra industry chains,etc). It uses SDL.
This page is available under a