Complex sentence: Cyan Worlds began development on its next project after the company finished 1997's "Riven", the sequel to the bestselling "Myst"; the game that became "Uru" would take more than five years and $12 million to complete.
Split into simpler sentences: Cyan Worlds began development on its next project after the company finished 1997's "Riven", the sequel to the bestselling "Myst". The game that became "Uru" would take more than five years and $12 million to complete.