The Player's Locomotive is a vintage steam locomotive owned by The Player.
The Player became interested in trains but strives for perfection and realism. He utilized a seemingly genuine locomotive in his quest. The train accelerated at supernatural speeds once the Ghostbusters and Slimer boarded the caboose in search of the Player. He explained they had 30 minutes to reach the engine room and stop the train in order to win their freedom. Each train car was an interdimensional containment unit  and whisked the guys to other places, including a swamp and a pinball machine. In order to stop the engine, they needed to hit a jackpot on a slot machine. Egon Spengler correctly deduced only Slimer could do it. Once the engine stopped, everything went back to "normal."