Splinter Cell and Thief are the only series I'm familiar with that actually have light and shadow based stealth. Everything else is all hiding around corners or inside/under furniture, like Metal Gear Solid.
The Splinter Cell lighting stuff never made much sense anyway, since you'd be perfectly fine if you were standing in a shadowy patch while making a clear silhouette on the illuminated wall behind you.
The strangest misbehavior moment I remember from the first game was like this: There were two NPCs working on computers in a dark room. Behind them was an open door to an illuminated office. I walked into the office and shut the door, they didn't notice there was suddenly no light coming through. I turned off the office light, no reaction. I opened the door again, and then they noticed the office light had gone out.
The Splinter Cell lighting stuff never made much sense anyway, since you'd be perfectly fine if you were standing in a shadowy patch while making a clear silhouette on the illuminated wall behind you.
The strangest misbehavior moment I remember from the first game was like this: There were two NPCs working on computers in a dark room. Behind them was an open door to an illuminated office. I walked into the office and shut the door, they didn't notice there was suddenly no light coming through. I turned off the office light, no reaction. I opened the door again, and then they noticed the office light had gone out.