Here is the full list of all 44 Warriors Orochi 3 Ultimate (JP) achievements worth 1,000 gamerscore.
Accomplished all of the Achievements in the game.
Obtained all of the Mystic Weapons.
Completed all of the requests within Gauntlet Mode.
Obtained all of the Strategy Cards in the game.
Performed all of the special Triple Rush attacks.
Cleared all of the stages within Gauntlet Mode.
Cleared 5 straight stages in Gauntlet Mode.
Unlocked all of the playable characters within Gauntlet Mode.
Maxed out the Bonds with one of the following officers: Momiji, Kasumi, Sterkenburg or Sophitia.
Used the Craft command 100 times.
Made it through 50 Survival battles in Duel Mode.
Played Survival for the first time in Duel Mode.
Defeated 10,000 enemies.
Cleared the stage "Revenge of the Fox" in Story Mode.
Cleared the stage "Rescue of the Mystics" in Story Mode.
Cleared the stage "Escape from the Mystic Realm" in Story Mode.
Found Kyūbi's nine tails and defeated them.
Obtained a Mystic Weapon for the first time.
Found Kyūbi's tail and defeated it for the first time in Story Mode.
Cleared the stage "Showdown at Odawara Castle" in Story Mode.
Cleared the stage "War against the Serpent King" in Story Mode.
Unlocked Yinglong as a playable character.
Cleared the stage "Battle of Itsukushima" in Story Mode.
Cleared the stage "The Imprisonment of Tamamo" in Story Mode.
Played a match online or with another player for the first time in Duel Mode.
Unlocked Momiji, Kasumi, Sterkenburg and Sophitia as playable characters.
Promoted a single officer a total of 3 times.
Changed the color of an officer's costume.
Defeated an Otherworld Invader in Gauntlet Mode.
Used the Craft command for the first time.
Cleared Gauntlet Mode for the first time.
Cleared a stage for the first time in Gauntlet Mode.
Summoned an ally for the first time in Gauntlet Mode.
Completed a request for the first time in Gauntlet Mode.
Performed a Formation Attack in Gauntlet Mode.
Used a special Triple Rush attack.
Used a Strategy Card for the first time in Duel Mode.
Played a match against the CPU for the first time in Duel Mode.
Cleared a battlefield in Musou Battlefields for the first time.
Performed a mounted True Triple Attack.
Used an aerial Special Attack.
Obtained a Scroll of Enlightenment.
Used a True Musou Burst.
Changed your character's battle style.