I thought it would be fun if this would be portable.
http://wildfiregames.com/0ad/
From the website:
What is 0 A.D.?
* It's a free, open-source, cross-platform RTS game of ancient warfare.
* It's an educational celebration of game development and antiquity.
* In development since 2001, it holds promise to engage countless gamers worldwide.
It's similar to Age of Empire