Tank Battle is a two player game loosely based off of Tank Trouble. Andrewgamers has another project like this: Submersible Warfare. Red Tank: WASD to move, 1 to fire. Blue Tank: Arrow keys to move, M to fire.
Originally developed by Andrewgamers, who then had DaveTheGamer80 work on more maps. This is currently a very pieced together version. It is intended for educational use so this is the first stage for intermediate and beginning students to work with and add the rest of the functionality.