As a break for my aged fingers from Street Fighter, today I installed 0 AD, described as A free, open-source game of ancient warfare, on Ubuntu. I’ve been a fan of Civilization, in each incarnation, so I’m quite excited to try this high quality open-source title. Feature of the 0 AD, from the site: 0 A.D. (pronounced “zero ey-dee”) is a free real-time strategy (RTS) game of ancient warfare. Lead…