Jiro Ishii, the writer behind the critically acclaimed visual novel 428, was working at Level-5. There he created Time Travelers, a story driven video game set in 2031 Tokyo where a Space Elevator is in the center if the city. Both games have a mechanic where you see the story from different protagonists who are seemingly unrelated.
Since both of those titles were only released in Japan, Ishii is probably best known in the West for the Zero Escape series. He was the producer on Nine Hours, Nine Persons, Nine Doors.
Ishii announced that he going freelance and working independently. Right now, Ishii is creating the story for Under the Dog, a Kickstarter funded anime series, along with Yusuke Kozaki and Masahiro Ando.