What is Micropolis?
Micropolis is a open city-building simulator game and is based on the original source code of SimCity , which was donated to the One Laptop per Child (OLPC) project by Electronic Arts as free and open source software under the terms of the GPLv3.
The online version and theFacebook app are unavailable. The source code and the Java version are available from Google Code.
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Said about Micropolis as an alternative
It is the original source code ported into Java.