ThinkTanks, also called TT, is an online multiplayer third-person shooter

Third-person shooter

Third-person shooter is a genre of 3D action games in which the player character is visible on-screen, and the gameplay consists primarily of shooting.-Definition:...

 available for Microsoft Windows

Microsoft Windows

Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

, Mac

Mac OS

Mac OS is a series of graphical user interface-based operating systems developed by Apple Inc. for their Macintosh line of computer systems. The Macintosh user experience is credited with popularizing the graphical user interface...

, and Linux

Linux

Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

. It was developed by BraveTree Productions and marketed by GarageGames

GarageGames

GarageGames is located in Las Vegas, Nevada, USA, where it was moved after being acquired by IAC in 2007. As the makers of Torque game development technology, they have provided cross-platform technology and tools since 2000...

 and Shockwave.com.
Aliens from "Alien Mind Control" have kidnapped human soldiers and put their brains into tanks. Then, they set the tanks on replicas of Earth terrains and watch them fight for their own amusement.