The Puzzle Box

The premise is that the protagonist is locked into a haunted room with the puzzle box of the game's title. The hauntedness of the room is not especially important and the framing story barely affects play, though: instead, we spend the entire game entering a series of combinations into the puzzle box, each combination leading only to the opportunity to enter another one.

We discover the combinations, for the most part, by examining the environment, especially a highly detailed oil painting on the wall. There are a couple of puzzles that require some sort of leap of intuition to work out how an element of the painting reveals a combination for the lockbox, but quite often it is simply a matter of finding an appropriate sequence of colors and numbers and laboriously entering them into the box.