TagWars for Java ME

TagWars is a mixed reality mobile multiplayer game that uses 2D barcode tags to represent medieval villages in real life. To visit, attack or defend a village, players have to walk up to a tag and scan it.
Your objective is to own as many gold generating villages as you can by successfully attacking villages with units you trained. Once you have taken control over a village, you set a defense strategy by carefully choosing units and putting them at the right defense position. Attackers choose units for attacking and will try to win the battle by sending the right unit at the right time to crush the village owner's defense strategy. This battle will be fought in a visually compelling 3D environment on the attackers mobile without the defender being present.

Thus a defense strategy should be challenging to the attacker and you should reinforce your defense units continuously to make sure nobody takes your villages.