The folks who brought you the original SimCity nearly 20 years ago have now brought you the free edition of that game.
“Source code for SimCity has been released under the GPLv3. For legal reasons the open source version was renamed Micropolis, which was apparently the original working title. The OLPC will also be getting a SimCity branded version that has been QA'ed by Electronic Arts. Some very cool changes have been made by Don Hopkins, who updated and ported what is now Micropolis. Among other things, it has been revamped from the original C to using C++ with Python. Here is the page linking all the various source code versions. Happy hacking!”
The decision to release the the SimCity source under a GPL license is due to plans to add the game to the OLPC's XO Laptop which currently runs all open source software.
Because EA, the game company that owns the rights to SimCity and other Sim games wants to protect its trademark, there have been a few changes to the original source code. All references to SimCity have been replaced with "Micropolis," which was the original working title for the game.
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