This game purports to be an exploration of the Christian faith. You are the son of the centurion who stood on Golgotha, and you are sent on a quest to explore various cities.
In each city, you explore different areas, and see NPCs, but you don't have to do anything.
As you leave each city, you are given a choice of three directions to go in corresponding to 3 beliefs. You have to choose the correct belief to progress.
The game seems to me to be a subtle parody. The graphics are at times ridiculous (the meditating shopkeeper); the character is very excited at how clean the angel is; your character ends up suffering quite a bit, but is grateful that thieves left him his shoes; it all seems a sort of fun-poking 'from the inside' the way that Jacek Pudlo troll RAIF 'from the inside' (where you pretend to be a fan of what you hate, and then say things that other fans are embarrassed by).