Gromada is an artificial planet built as a fire ground for new battle machines. You are the master and chief constructor of this iron world which consists of battle robots, cannons, tanks, helicopters, planes and floating mines.
Mysterious alien forces have come to destroy your planet and have taken control over all battle machines. The only one they could not capture was your favorite creation Cassandra, a superb tank with unlimited battle capabilities. You and Cassandra must regain control over the planet and destroy all enemy units.