Simplify the following text for a Grade 9 native English-speaking person.
Original: He then completed work on a sequel to The Wind Waker for the Nintendo DS , The Legend of Zelda : Phantom Hourglass , followed by another Nintendo DS title , The Legend of Zelda : Spirit Tracks .
Simplified: He is most well-known for his work in The Legend of Zelda series , most recently with The Legend of Zelda : Phantom Hourglass for the Nintendo DS .