I recently came across this page over at Moby Games for a PC game called Lifestream. It was a game created by Christopher M. Brendel and released in 2004 by Unimatrix Productions. According to its description page it was a 1st person adventure with detective / mystery elements, horror, and puzzle solving.
Here’s the full description
Father Randolph Holton, a Catholic priest, has disappeared. The son that no one knows about, John, goes to his father’s home to search for him. He soon learns that his father had become obsessed by something he called the Lifestream. To find his father he must also dive into the haunting, terrifying truths that seduced him. What on earth is the Lifestream and how could it have caused his father’s disappearance?
At first you play John in the present as he searches through his father’s notes and his house (inside and outside) to discover his whereabouts. As the game progresses, travel back in time to play Father Holton.
There are many adventure type puzzles to solve in this point-and-click game. You’ll find other characters to talk to and objects to find and use in this haunting adventure.
It sounds pretty interesting and I wouldn’t mind actually giving it a go. Too bad it’s so hard to find.
I created Lifestream Blog and hope you enjoy the site. I'm always looking for contributors so 
Lifestream Blog Logo by 
Oh, come on. Completely unrealistic! Why did Brendel think that someone would become completely obsessed over something called a Lifestream? What kind of a story is that? Now if you'll excuse me, I need to check and make sure this Disqus comment makes its way to my FriendFeed and Facebook feeds, and over to Google Buzz…
Seriously, I need to do some research to find out when the term “lifestream” was first used in its present-day meaning. Perhaps you've already discussed this in a prior post.
Wow; I didn't realize that the term went all the way back to the mid-1990s. http://www.netlingo.com/word/lifestreaming.php
You seem to have found some info but I do provide details on the origins of Lifestreaming on the about page John.
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Seems like a good game
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seems a boring game