You control an aspiring tactician named Avery who has just graduated from the Sacrue Tactics Academy. As their home nation of Sacrue wages war, they have to tough through a war that nobody really wants to be a part of. The story is set in relatively more modern times, being based off the 1700's.
The game is split into three routes, depending on which country you decide to ally with at Chapter 1. There is no "good", "bad" or "neutral" route as the whole continent is at war. There will be varying shades of moral gray throughout each campaign.
This path involves the player choosing to support their home nation of Sacrue. The Avatar is immediately sent to war after graduating and is thrown into the deep end of the conflict. While the King demands total annexation of the neighboring lands to further his kingdom, the Avatar finds that the common soldiers are torn between their loyalty and whether the war that they are fighting is needed or not.
This path has the player going off to the neutral country of Vlasais to further their studies. While a neutral country, Vlasais has a large army for protecting itself. While fairly prosperous, the country has internal tensions between the north and the south for their opposing ideals. Eventually, a civil war breaks out which the Avatar is caught up in. As this is going on, Sacrue uses the war to their advantage and strikes, involving the player in the rest of the continent's worries.
Al Marxia Route
This path has the player choosing to side with Al Marxia, which is the main country Sacrue seeks to conquer. It is a desert country but has a large wealth from its previous dark history in trading slaves and ruthless crusades. While under new more benevolent rulership, the rest of the continent is still bitter about it. The Avatar decides to pledge their service here as they oppose Sacrue's aggressive behavior and because they were Almarxis by birth.
Much like Fire Emblem: Genealogy of the Holy War, Fire Emblem: Awakening and Fire Emblem Fates, married characters produce offspring. However, this 2nd generation is not part of the main three routes and is a separate story altogether, featuring a time skip after the events of the first campaign, much like Genealogy of the Holy War and unlike Awakening and Fates, where the children characters get to fight alongside their parents.
A new weapon type is introduced to suit the 1700's era - muskets. Muskets use fixed damage outputs and their accuracy changes depending on how far away the target is from the user. They usually have 2-4 range and are good for either chip damage, a finishing blow or to snipe away a stray enemy.
The weapon triangle is changed slightly once more - the main triangle consists of three weapon types - Melee, Ranged and Magic. Inside each category is a smaller weapon triangle, which includes the original melee weapon triangle and magic triangle from the GBA games.
As with Fire Emblem Fates, weapon durability is gone and the weapons still use the debuff/effects system of that game. Staves remain limited use, however - but there are more types of staves this time round, encompassing a wide variety of effects from buffing an ally, debuffing an enemy, inflicting or curing status conditions, bringing back a deceased ally, general healing and many more.
For a full list of weapons, see Fire Emblem: Abstract Requiem/Weapons
Each playable character has their own personal skill as well as 5 other possible skills. Non-personal skills can be learnt by levelling up in a specific class. Units may reclass to gather skills.
There are over 100 classes in the game, including the exclusive classes meant for specific characters. Characters can reclass from their base class into a different class according to the character reclassing. Like in Fire Emblem: Radiant Dawn, characters who are in the first tier of classes can promote into the 2nd tier by simply levelling up to level 21. However, the player can also promote them early through the use of a Master Seal.
The base returns from Fire Emblem Radiant Dawn, although it has been upgraded with more features akin to the "My Castle" feature in Fire Emblem Fates. It is accessible between most chapters. Here, the player can interact with their units in base conversation to see how they are feeling and reacting to the previous chapter's events. The player can also view supports here as well. In addition to this, the player can access an armory to buy weapons; a staff store to buy staves, trinkets and other useful items; a forge to create more powerful weapons and a training arena where the user can level up units between battles through bonus experience earned through battles. There is also a mess hall which functions like the one in Fire Emblem Fates where a unit is assigned cooking duty and may cook for the entire army. Depending on the dish and the unit's cooking prowess, the player's army will get a small boost to stats for the next battle. Like in "My Castle", the player can collect different minerals and foodstuffs between battles and may buy them from base as well. These foodstuffs are able to be used in the mess hall, and the minerals are used to forge weapons. Depending on the chapter being played, the player may be able to access different things between chapters as well. For example, while setting camp in a busy town, the user can go to a lottery parlour to try their luck in winning items or gold. If near farmland, the player can get free foodstuffs. If near a mine, the player can send units to get ore for free. The player may also be able to access a wider variety of items by shopping in different stores as well. The player can also access their army records, dlc and other miscellaneous stuff in the records tent.
As with many other Fire Emblem games, there are optional chapters to play and most can be accessed at any time after unlocking them. These will scale with the player's current level often come with a new recruitable character - often these are the "trainee" units which start out very weak but grow very fast and strong due to their shared skill in Aptitude.
There are also character-specific chapters. If the avatar gets an A-support with a character, they will unlock a character quest. Essentially, these are extra maps that contain rewards. The character that it pertains to must be deployed and the rewards often reference their class or backstory. These are meant to flesh out the characters and provide some backstory or development for them.
For a full list of character quests, see Fire Emblem: Abstract Requiem/Character Quests
As with every Fire Emblem game, there is a very large cast of characters to choose from when playing as well as many other characters you meet in the story.
|Cyan||Sacrue & Vlasais|
|Yellow||Vlasais & Al Marxia|
|Magenta||Al Marxia & Sacrue|
Minor Villains (Bosses)
There are DLC maps available to be played.
|Spring Scramble - Town Square||The army is conscripted into ridding a town full of wanted criminals, all with bounties on their heads. The army is promised gold depending on how many enemies are killed.||Gold|
|Summer Scramble - Sandstone Resort||The army is taking a break in a beach resort when the resort town is being raided by bandits. The army must drive off the bandits and stop the town from destruction. All units will get unique portraits in this chapter, where they are depicted in swimwear.||Supports build up twice as fast in this chapter.|
|Autumn Scramble||The army comes across a harvest festival and decides to claim some respite and join in the activities. The festival however has attracted barbarians who have come to steal the food and money the festival has to offer. The army must fend off the attackers. All units will get unique portraits in this chapter, where they are depicted in casual wear.||Random rare staves and items|
|Winter Scramble||The army is caught up in a snow festival in the middle of the mountains. In the festival there is a fighting tournament in which the army takes part in as the prizes listed are valuable weapons. All units will get unique portraits in this chapter, where they are depicted in winter wear.||Random rare weapons.|
|Guardians of the Gate||Uses the map "Cog of Destiny" from Fire Emblem: Rekka no Ken||Bright Ring (reclasses any unit into the Holy Guard class)|
|Rainforest Raid||Warrior's Brand (reclasses female units into the Huntress class)|
|Witch's Trial||Witch's Mark (reclasses female units into the Witch class)|
|Dread Hunt||Dread Scroll (reclasses any unit into the Dread Fighter class)|
|Chapel of Fading Light||Uses the map "Last Hope" from Fire Emblem: The Sacred Stones||Saint's Robe (reclasses male units into the Pontifex class)|
|Clash of Steel||Uses the map "Two Falchions" from Fire Emblem: Awakening||Secret Text (reclasses any unit into the Weapon Master class)|
|Ready, Aim, Fire||Sighting Lens (reclasses any unit into the Cannoneer class)|
|Feathered Fate||Uses the map "Hinoka" from Fire Emblem Fates: Conquest||Ebon Wing (reclasses any unit into the Beacon class)|
|Into the Forge||Ebon Wing (reclasses male units into the Blacksmith class)|