If you’re worried about the future of Final Fantasy XI being available, you can rest assured that the 15th anniversary letter by producer Akihiko Matsui is quite confident in it. Matsui mentions that the team is small enough that no new major content can be rolled out, but the team did add Omen and Ambuscade to the game while rolling out monthly update. And players can celebrate 15 years of the game even further beyond the anniversary events with the upcoming “One I Can Trust” campaign, allowing you to create your own Trust NPC for the next year.
Players simply need to name an in-game NPC who currently lacks an alter ego and what effects said alter ego should provide; this can differ from player to player. Once you’ve specified your preferred companion, you’ll have a year to adventure with your companion at your side, so pick someone you want around for a while. That’s in addition to the many, many other events, including discounts, the Return to Vana’diel campaign, anniversary quiz rewards, and… well, everything you could ask for as a fan of the game, whether you’ve been playing for 15 years or just a few months.