Loco-Motion, known as in Japan, is an arcade puzzle game developed by Konami in 1982 and released by Sega in Japan. The North American rights were licensed to Centuri. In Loco-Motion, the player builds a path for their unstoppable locomotive by moving tracks which will allow it to pick up passengers. The game was ported to Intellivision, the Tomy Tutor, and–under a different name–MSX. A clone programmed by Carol Shaw of Activision, Happy Trails, was published for Intellivision before the official version was released. Gameplay Loco-Motion is an updated version of a sliding block puzzle game in which the player can move tiles horizontally or vertically within a rectangular frame that contains one empty square. The tiles are sections of railroad track and the player must use them to construct a path for a locomotive that never stops moving. Laid out around the edges of the frame are several stations with passengers that must be picked up. The player uses a joystick to slide a piece of the track into the vacant square and can use a button to accelerate the locomotive. However, it is always in motion and cannot be stopped. The player must avoid running into a dead-end barricade, a barrier at the playfield edge or the edge of the empty square; doing so costs one life. As the player moves the pieces of track around, the route the locomotive will take is highlighted in yellow up to any dead end. A countdown timer occasionally appears on a station. If passengers are waiting there and the player picks them up before the countdown reaches zero, the remaining amount is added to the score as bonus points. If not, the passengers send a "Crazy Train" onto the tracks and the player must avoid crashing into it. If a countdown timer at an unoccupied station reaches zero, the station is destroyed and becomes a pair of barrier squares. Crazy Trains can be crashed into each other to destroy them but doing so creates a new pair of dead ends or destroys a station if the collision happens within it. On higher levels, there are special pieces of track that have one entrance and three different exits. The player cannot choose which exit the locomotive takes from these as it is picked randomly. Bonus points are awarded each time the locomotive crosses one of these pieces of track. A level is