[Heh, I've never played Condemned (2) but Indigo Prophesy was mentioned, soo... TANGENTS]
First, I can understand the annoyance you might feel with any explicit explanation to Condemned where the ambiance is largely based on being in the dark, but are you people (i.e. the ones who have commented about it in this thread) serious about Indigo Prophesy?
It made no attempt to have a realistic plot. Let me review what you learn in the first hour (if you're a slow gamer, but not dense) of Indigo Prophesy:
The main character was controlled by some hooded figure who seems to be performing a ritual in a room full of candles. The stab wounds precisely cut the arteries to the heart, and this kind of murder has happened before.
So we've already set the bar at some sort of paranormal serial killer - where can we go from there?
Anyway, I might as well (since I registered) take the opportunity to spread the gospel to adventure gamers: go get The Longest Journey, now. The _only_ argument I've heard against it so far is how long it takes to get into the story, but come now, it's an adventure game - go play CS:S/Halo if you want instant gratification.