From the box:
'Suspense ... which way will CHOO CHOO go from the center? Where will it be when the "TNT" explodes?
Strategy ... to score points, place railroad crossing danger sign where you think "TNT" will explode.
Skill ... switch fast ... out of your section ... when the little CHOO CHOO chugs into your territory.
BE QUICK TO SWITCH OR ELSE!'
The game comes in a large 15" square x 5.5" high box and is a huge 30" square when assembled. Each player controls a quadrant of the gameboard track. The clockwork engine, which ejects an 'exploding' piece of dynamite when the mechanism runs down, must be manipulated into opponents' areas by switching the direction of travel. Points are scored relative to the area where the explosion occurs. The engine is then rewound, the dynamite replaced and the procedure repeated.
The first player to amass ten points is the winner.