Positech Games have released a demo for Gratuitous Tank Battles, the RTS/tower defense hybrid. The game is a semi-sequel to Gratuitous Space Battles and features online gameplay and customizable units with a map editor thrown in for good measure. If you've been wanting to check out the game or have absolutely no idea what it is there's no better time than now!

Head over to the official website to grab the demo and check out some screenshots for the game below.