BZFlag is a free online multiplayer cross-platform open source 3D tank battle game.
The name originates from "Battle Zone capture the Flag".
It runs on Irix, Linux, BSD, Windows, Mac OS X, and many other platforms.
It's one of the most popular open source games ever on Silicon Graphics machines and continues to be developed and improved to this day.
Get it here... BZFlag
Source: Entretenimiento Online
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