Heh , the genre of game you want is called "Digital Comic" I am a big fan of these types of games as well
Too bad Policenauts "the unnoficial sequel to Snatcher" was never translated because its supposed to be AMAZING I have it but cant get past all the "sushi" someday I will learn Nihongo, just so I can play it.
Well There are 3 games by Kemko Seika that you must play, although they are on NES so they dont have the same cinematic appeal that the newer ones have but just as fun none the less they are:
Shadowgate ....also called "castle shadowgate"
Dejavu
The Uninvited
play these three titles they are really good for their time also here is a link to a small page dedicated to the digital comic genre.
http://www.sega-16.com/Digital%20Comics%20-%20Forgotten%20Genre.htm