Complex sentence: Action-adventure games normally include a combination of a series complex story elements made into an audio-visual display for players that is heavily reliant upon the player character's movement which affects the flow of the game.
Split into simpler sentences: Action-adventure games normally include a combination of complex story elements, which are displayed for players using audio and video. The story is heavily reliant upon the player character's movement, which triggers story events and thus affects the flow of the game.