Stratagus

[redlabour]

Stratagus is a free cross-platform real-time strategy gaming engine. It includes support for playing over the internet/LAN, or playing a computer opponent. The engine is configurable and can be used to create games with a wide-range of features specific to your needs. See the data sets page for a list of current games using the stratagus engine.

http://stratagus.sourceforge.net/

[jdong]

http://packages.ubuntu.com/cgi-bin/search_packages.pl?searchon=names&version=all&exact=1&keywords=stratagus

Already in Ubuntu... This is the second time; please look before you request!