Here is the full list of all 46 Grand Kingdom trophies - there are 28 bronze, 15 silver, 2 gold and 1 platinum.
Defeated the Grand Mercenary Squad with a lower-level squad.
Dealt 20000 damage with one attack.
Launched a unit 9 character-heights.
Knocked back a unit 8 character-lengths.
Clear a Target Quest with just one unit.
Defeated every Bounty Head!
Went to all areas on a Travel Quest.
Achieved Mercenary Rank of S!
Performed a 99-hit combo during one turn.
Obtained 20 flags.
Removed every type of obstacle on the field.
An ally Shaman reflected an attack to kill an enemy.
A Rogue picked up a item containing explosives.
Win a battle using the Challenger's self-destruct skill, resulting in a double KO.
Performed a Class Up!
Leveled a unit to level 99!
Killed an invisible unit while it was still invisible.
Killed 3 enemies simultaneously!
Clear a Destination Quest without engaging in battle! (Spy Quests excluded)
Visited each capital of the Four Great Nations.
An ally was eaten by a Slime.
Synthesized equipment at the blacksmith.
Prepared to flee from battle, then fled after a unit died.
You finally obtained a Golden Baku!
Adjust a quest's difficulty before clearing it.
Reach 99 in any stat on any unit.
Achieve victory with just 1 HP remaining.
Killed 2 enemies simultaneously.
Met and received treatment from all 4 Healing Sisters.
Die by stepping on a hazard.
Destroyed an object while a unit was on top of it.
Clear a Destination Quest without using field skills and items. (Spy Quests excluded)
Equip glasses on one of your units.
Killed an enemy using knockback damage.
Upgraded equipment at the blacksmith.
Forged something at the blacksmith.
Achieve victory while morale is low.
Used Grit to avoid an enemy attack.
Finished off an enemy with an Assist.
You hired a new unit.
You are now affiliated with the Guild.
Attack an ally unit with an area-of-effect attack.
Congratulations on getting all the trophies!
Walked 20000 steps.
Learned every possible skill on one of your units.
Obtain 150 total policy points.