Here is the full list of all 23 Brave Hero Yuusha EX achievements.
Complete Chapter EX.
Reach Level 30 with at least one character. Then stay at the inn.
Complete the tournament at the Mitten.
Return your library book when you are done with it.
Collect the 7 Legendary Artifacts and awaken their power.
Cast Prism Pulse while affected by both Invoke and MP Lock.
Deal 300 damage or more using Money Madness.
Fail the roaming fire puzzles 10 times.
Open every door in the game.
Receive a great compliment after your adventure has ended.
Blatantly lie about what qualifies as good humor.
Complete the game.
Talk to every cat in the game.
Restore Canbrooke.
Complete Chapter 4.
Collect all 25 Moon Gears and help the Moon King return home.
Restore Vexus.
Restore Myconia.
Complete Chapter 3.
Complete Chapter 2.
Restore Garmuldar.
Restore Landia.
Complete Chapter 1.