A discussion of permanent consequence

Two X-Rays, one leering at my entrenched squad from the top of a defunct train, the other slinking about the benches and flower beds of the ruined subway. The aliens had set up a bomb in the Japanese rail system, and it was up to us, the stalwart soldiers of X-COM, to make sure that Shibuya didn't become a smoking, whitewashed memorial to the advanced technological might of the extraterrestrial invaders.