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