From Wikipedia
The Longest Journey (Den lengste reisen) is a point-and-click adventure game developed by Norwegian studio Funcom for the PC. The game drew praise from critics for its enigmatic, complex storyline and high production values, but was criticized for some of its more obscure puzzles.
The game takes place in the parallel universes of Arcadia, a world of magic, and Stark, a world of science and technology. The protagonist, April Ryan, is an 18-year-old art student living in Stark. She learns that the line between the two worlds is growing thin, causing chaos on both sides. April also learns that she is a Shifter, one who is capable of walking between these worlds, and is then tasked with restoring the Balance between the dimensions before it is too late.