You might want to check out tower22





http://www.youtube.com/watch?v=fEK808gC1GM&feature=plcp older video, but "more action" and "more scary"
http://www.youtube.com/watch?v=b7gK3AiBS7I&feature=plcp newer HD video

Also make sure to check out the dev blog
http://tower22.blogspot.de

There's a lot of great info there, not only about the game, but also about how the effects were done. So this might be a good read for ryL_eXile as well as MasterQ32 (who seems to be creating a deferred renderer for this?)

Their main website is located here: http://www.tower22game.com/

Shade-C EVO Lite-C Shader Framework