I would love to see more open source clones, especially of Theme Park, one can always wish , heres the release news:

OpenTTD is an open source clone of the Microprose game “Transport Tycoon Deluxe”, a popular game originally written by Chris Sawyer. It attempts to mimic the original game as closely as possible while extending it with new features. Ported to Pandora by Canseco.

– Latest stable release.
– Updated sources and libs.
– See changelog: http://uk.binaries.openttd.org/binar.../changelog.txt

via http://pdroms.de/pandora/open-transp...dora-game-port