Phantasy Star's 35th Anniversary was in December this past year (2022) while Phantasy Star Online 2 celebrates Ten years and SEGA is honoring the occasions with a live concert on January 21:
https://www.rpgfan.com/2023/01/14/sega- ... y-concert/
https://gametyrant.com/news/sega-celebr ... ve-concert
Happy Anniversary to these Phantasy Star games!