Pocket tanks is a game, similar to the game in the database, charred dirt. The difference between them is the size since pocket tanks is only 6mb and charred dirt is 55mb. I'm aware that it says its shareware, but you can play the unregistered verison as long as you like. The only issue is probably startup and endding screens asking you weather or not you want to register.
link:http://www.blitwise.com/ptanks.html
download link:http://www.blitwise.com/ptanks.exe
requirements:233 MHZ Intel or AMD Athlon/Duron processor, DirectX 3.0 or greater
to extract:download installer and install. copy files from that folder to a folder of your choice. start the game by double-clicking on ptanks.exe
settings are written to application folder(options.dat)