As players approach the end of , they will prepare to face the game's final boss, the Nyx Avatar. This final boss fight will occur on January 31st in-game and, unfortunately, players will have to climb several floors of Tartarus before reaching Nyx, which they will be forced to do immediately before reaching him as these can not be done in advance.
There will be several smaller bosses on the floors before Nyx, but they are nothing compared to what awaits players on the top floor.The boss fight with Nyx will occur throughout fourteen different phases, each based around an Arcana in which Nyx will have different moves and affinities as he progressively becomes more deadly.
The following article contains spoilers for the ending of Persona 3 Reload.
As stated, players will not have the option to face Nyx until a pre-programmed date in the game. There is no way to rush to this fight early, as the last several floors of Tartarus are locked to the player until January 31st. Players should also keep in mind that January 30th and 31st are the last days they will be able to engage with any of their Social Links, even though the game officially continues until March. So, if there are any Social Links close to being maxed out, this would be the last chance to try to complete them.
At the end of the day on Jan 31st, players will begin their ascension to Tartarus' remaining floors in , where they will have to face off against a few other story bosses along the way.
Once they've completed those, they will eventually reach Floor 264, where Nyx awaits. This will be the end of the line, so do not ascend to this floor until you are prepared to begin this fight, as it will be a fight of endurance and those who are not adequately prepared will suffer tremendously.
Take the Teleporter on Floor 263 down to the entrance to complete all necessary preparations before continuing to Floor 264. Additionally, before heading into Tartarus for the night, try to ensure you've equipped yourself
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