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