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