Games where the plot revolves around a corrupt religion etc

Tales of Symphonia is another one, though it's not exactly a central plot device. It follows the whole religion being used to control the masses thing similar to Xenogears. And of course it's a Gamecube game, so not exactly the system of choice for typical RPG fans.

Jam it back in, in the dark.

Originally Posted by Enkidu

the whole Billy thing and that Father Stone was only a minor point if you look at the entire plot, you can't really say that the game is about a corrupted religion because of that. It uses a lot of religious terms, and the whole "god" thing, but this alone does not qualify the game as having a corrupt religion.

Spoiler:

Well that was a small plot point, but the entire existence of Ethos is a critical and central story element. The Ethos pretty much controlled the surface world. The religion prepared and shaped the people for the awaking of Deus. Ethos controlled the excavation of the gears and well as controlled most of the technology of the world. They also controlled basic information about the true nature of the world. And finally the Ethos was put in charge of protecting the gates which hid Solaris from the view of the ground world.

I'd say all of that makes it a prime example of a game that centers around a corrupt religion.

There's nowhere I can't reach.