Complex sentence: The game takes place at roughly the same time as the events in "The Matrix Reloaded"; a character may walk out of a scene in the film, only to walk into a scene in the game.
Split into simpler sentences: The Game takes place in the same universe at roughly the same time as the events in The Matrix Reloaded. A character may walk out of a scene in the film, only to walk into a scene in the game.