Here is the full list of all 38 WARRIORS ALL-STARS achievements.
Collected all achievements.
Saved allies 5 or more times in a single battle.
Received the maximum level of Regard from every character towards any one character.
Cleared all Story, Hero and Dramatic Battles.
Sealed Yomi away and saved the world.
Viewed bathing events for every character.
Unlocked all actions for every character.
Was sent back forcefully.
Unified the world and then gave it away.
Became the ultimate idol in this world.
Lost your memory... again.
Proved that you are the strongest.
Parted ways with Tamaki in order to protect her.
Decided to live as a kunoichi in this new world.
Led Shiki to become the new ruler.
Put on an act in order to save the world.
Displayed the strength of a hero.
Ate 10 or more meat buns in a single battle.
Captured an evildoer.
Cleared Story Mode in 3 hours or less.
Led Setsuna to become the new ruler.
Led Tamaki to become the new ruler.
Defeated 8 or more enemy officers using Hero Skills in a single battle.
Purified Yomi and restored the world to its original state.
Unlocked all of the regions on the World Map.
Reached the maximum level with any one character.
Viewed level 3 conversation event with any one character in the Sanctuary.
Searched the barrel.
Collected 100,000 Gold or more.
Activated Musou Rush 3 times or more in a single battle.
Used a Combo Skill.
Received the maximum level of Regard from any one character.
Cleared a battle using a Special Attack.
Cleared any battle without taking any damage.
Cleared any battle in 2 minutes or less.
Won the first battle.
Earned 5000 or more EXP in a single battle.
Obtained material.