BattleTanx is an old, old game that I played on the Nintendo 64 back in the day. I believe another of this game was out for an older system, but I don't recall. The object of this game was to defend your base, which housed your queen, while at the same time attacking the enemy's base to capture their queen. The best part about this game was that it was pure tank combat with various kinda of tanks. It was such a fun game.