TankNation (2009) is an university project. The game consist of a classical Deathmatch of tanks with spawned powerups. It featured multiplayer online capabilities and offline through an IA.
The game was made in C++ with Clanlib SDK and its score handling using SQLite (local), and MySQL databases (global). Most of the code is in Spanish, I will try to translate it into the future, but you're welcome to do so.
To download a binary (Windows) go to https://sourceforge.net/projects/tanknation/
This game may be ported to Linux.
Email: vladimirdlc@gmail.com
github: https://github.com/vladimirdlc
twitter: @vladimirdlc
onegameamonth: http://onegameamonth.com/vladimirdlc