The player assumes the role of a chief operations manager at a railway. Two different track layouts are included, A and B, each viewed from overhead on a single screen. Trains must be kept running by operating switches to avoid derailment. To score points, trains must stop at stations to pick up passengers. The player selects a level of play, which determines the number of trains running, and for every 25 passengers picked up, the sub-level increases by one. If passengers are kept waiting too long, they become angry and do not increase the player's score. Up to three trains may be running on the network, and passengers are colour-coded indicating which train they wish to board.
Each switch is designated a letter of the alphabet, corresponding to the keyboard key the player must press to switch it. Track A has 25 points, and track B has 19. While the player may pause the action to consider which points to switch, doing so decreases the score. Occasionally, goods trains will enter the network, and must be directed back the way they came.
Source: Wikipedia, "The Train Game", available under the CC-BY-SA License.