The Phantom Train is a location found only in the NES Strider. It isn't an actual stage, but a section of the Egypt stage. There's a passing mention in the manga about a trans-siberian railway under Kazakh's control, which may have been the inspiration behind this part of the game.
The Phantom Train is a secret means of transportation used by the Kazakh Secret Police. It's known to connect Kazakh with the Egypt base. The train has several railroad cars, with automatic guns and soldiers serving as its defense. It is controlled by an eye-like computer engine located on the train's last car. On the train's sides one can see Kazakh's "half-star" symbol.
The Train Engine is the eye-like computer that controls the Phantom Train. Hiryu confronts the enemies and soldiers on top of the Phantom Train as it moves, and then faces the engine itself at its end. Upon its destruction, the train stops moving and Hiryu continues on with his mission in Egypt.
The engine sits atop a small column at the final car of the train, and is protected by a single three-barreled cannon below it. The cannon doesn't move, it simply shoots three bullets upwards from its position constantly. Either carefully moving around the bullets or taking a bit of damage, Hiryu can simply jump behind the core, where the cannon can't reach him, and easily destroy it.
- Wada, Tatsumi (Nov 10, 1989). Strider Hiryû. Chapter 1, Pg. 43. Kadokawa Shoten. ISBN 4-04-713009-5.