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Castlevania: Harmony of Dissonance (known in Japan as Castlevania: Byakuya no Concerto, the sub-title loosely translated to "Concerto of the Midnight Sun") is a 2D horror-fantasy action-adventure platformer developed by KCE Tokyo and published by Konami (Company) for the Game Boy Advance (Platform) in Japan (on June 6, 2002), North America (on September 16, 2002), and Europe (on October 11, 2002).
A spiritual sequel to Castlevania: Symphony of the Night, Harmony of Dissonance features the same gameplay style of free-roaming backtrack-focused exploration with RPG-style attribute, inventory, and experience systems.
The game takes place in 1748, a half-century after Dracula's defeat from the legendary vampire hunter Simon Belmont (Character). The player takes control of Juste Belmont (Character), grandson of Simon and heir of the Vampire Killer (Object) whip, as he explores a mysterious castle (alongside friend and fellow vampire hunter Maxim Kischine) to rescue his childhood friend Lydie Erlanger (Character).
Along with the classic Castlevania combat style of whip and sub-weapons, Harmony of Dissonance features a unique gameplay mechanic known as "Spell Fusion", which builts upon the traditional "Item Crash" by allowing Juste to perform a unique magical attack based both on his current sub-weapon and his equipped magical tome.
In 2006, the game was bundled together with Castlevania: Aria of Sorrow in one cartridge as Castlevania Double Pack (Game). The game was later digitally re-released for the Wii U (as a Virtual Console title) in North America on October 16, 2014, in Japan on January 21, 2015, and in Europe on February 19, 2015. It was also included in the 2021 compilation Castlevania Advance Collection for the PlayStation 4 (Platform), Xbox One (Platform), Nintendo Switch (Platform), and PC (Platform).
The control pad of the Game Boy Advance is used to move Juste left and right. The A button is used for jumping and the B button is used for attacking. When the floor beneath Juste is thin, jumping while crouching allows him to bypass the floor. Juste is unique to other Castlevania playable characters in that he can freely dash forwards and backwards by pressing the L (for dashing left) and R (for dashing right) buttons.
Like Richter Belmont (Character) in Castlevania: Symphony of the Night, Juste can only attack horizontally with his Vampire Killer whip, but can flail it around by holding down the attack button and moving the d-pad (shielding him against projectiles while doing minimal damage in any direction close to him). Collecting certain whip upgrades changes the result of holding down the attack button.
Like traditional Castlevania games, Juste can use sub-weapons by holding up on the control pad and pressing the attack button. Sub-weapons are unique attacks that use up the Heart (Object) meter (which is replenished by finding heart-shaped tokens). Juste can carry only one sub-weapon at a time, which is usually found in breakable objects. Damage done by sub-weapons is proportional to the amount of STR stat Juste has. Some equippable items change the basic properties of sub-weapons.
Unique to Harmony of Dissonance, however, is Spell Fusion. Similar to Item Crashes in Castlevania: Rondo of Blood, Spell Fusion is a special magic attack that is determined both by Juste's equipped sub-weapon and spell book. These special attacks do not consume any Hearts, but do consume mana, which is both replenished automatically over time and at save points.
There are five spell books hidden throughout the castle: Fire Book, Ice Book, Bolt Book, Wind Book, and Summoning Tome. Performing a Spell Fusion attack is the exact same as using a sub-weapon. However, spell books must be toggled on (which is indicated by the background of the sub-weapon area in the HUD). Pressing both dash buttons while holding down on the control pad toggles between using spell books and using normal sub-weapons. Holding up on the control pad while pressing either dash buttons switches between different spell books on-the-fly. Spell books can also be toggled in the status menu.
If the player manages to receive the Summoning Tome without picking up a single sub-weapon, he can use the Summoning Tome (provided Juste doesn't pick up a sub-weapon) to make a glowing aura appear around Juste for 100 MP, fully healing him.
Juste's Vampire Killer whip is not only affected by the amount of damage dealt by Juste's STR stat, but is also affected by special whip upgrades found among the castle. He can only equip one whip upgrade at a time, which can be changed in the status menu.
Along the way, Juste can pick up special relics (which can be toggled on and off in the Relics menu of the status screen) that gives him special abilities, allows him to identify enemies, increase his stats, and allows him to progress throughout the castle.
Throughout the game, Juste will find three special relics that give him special abilities. (All are necessary to progress throughout the game).
Early in the game, Juste can pick up three relics that can identify enemies and the damage inflicted onto enemies.
Juste can also find relics of Dracula (a nod to Castlevania II: Simon's Quest) hidden throughout the castle, which not only increase Juste's stats and tolerances, but are also important for achieving the best ending.
Along with relics and equipment, Juste finds miscellaneous items along the way. Some are used automatically and help Juste progress through the castle (such as keys) while some can be collected and must be used manually in the "Items" menu of the status screen (such as health potions). Most can be found in rooms throughout the castle while some can be dropped by enemies. They are split up into several categories:
Along the way, Juste finds an empty room in dire need of some furniture (for some reason). As a collectible gimmick (which has no impact on gameplay), players can find decorative goods scattered throughout the castle that can be picked up. When picked up, they can be viewed in the "Collectibles" section of the "Secret Info" menu of the status screen. When Juste re-enters the collectible room, the furniture will be placed inside the room.
While finding all collectibles have no impact on gameplay whatsoever, it slightly alters the best ending.
Harmony of Dissonance has some bonus game modes that are playable once the game is complete as Juste. Some modes allow players to play as different characters, such as Maxim. Sound Test is also unlocked when getting the best ending the game as Juste, allowing you to play any music track.
By inputting "MAXIM" as the player's name once the game is complete as Juste, players can play through the entire game as Juste's friend and master swordsman, Maxim Kischine. Similar to Richter Mode in Castlevania: Symphony of the Night, Maxim Mode contains no story, dialogue, inventory, status screen, and experience points. He can, however, collect Life Max Up and Heart Max Up powerups to make him stronger.
Maxim plays wildly different than Juste. He is faster and has special moves, but only has access to one sub-weapon (the Large Shuriken, which uses up 5 Hearts for a strong boomerang effect) and has no access to Spell Fusion. Instead of the traditional Vampire Killer whip, he has access to the Stellar Sword, a sword that is used for powerful and quick lunges. He also has a slide attack, a jump kick attack, the ability to triple jump, and special martial arts abilities done by certain d-pad and button combinations:
Boss Rush is an arena mode selectable from the main menu once the game is complete as Juste. Here, players go through a set of bosses consecutively with no experience system in play. Players begin in a corridor where they select their sub-weapon (which will remain with the character throughout the mode) before entering a room with the first boss. They can only regain their health by collecting Mystic Spheres dropped by each boss. Six large Hearts (which gives 30 Hearts) can be collected in-between bosses.
There are three difficulties: Easy, Medium (unlocked by completing Easy), and Hard (unlocked by completing Medium). The only differences between the difficulties is the number of bosses players will fight. The game also includes a local leaderboard system, showing the number of bosses defeated and the time it took to defeat them. By default, players play as Juste (who has Spell Fusion disabled). Maxim can also be played by holding down L and R while picking a difficulty.
Entering the Konami Code (Concept) when the Konami logo appears allows players to play as Simon Belmont (Character) (in his original Castlevania (Franchise) form) in Boss Rush Mode only. Simon plays exactly like he did in the original Castlevania, meaning that along with no Spell Fusion attacks, he cannot dash, slide, control his jump mid-air, double jump or super jump. However, he is immune to status ailments such as poison and curse. He only has access to the Dagger, Axe, Cross, and Holy Water sub-weapons, with the Holy Water acting more like the traditional Holy Water in the original Castlevania.
By putting in "HARDMODE" as the player's name, players can play the original game as Juste with all attacks doing less damage. By putting in "NO MAGIC" (using the R button as the space between NO and MAGIC) as the player's name, players can play the original game as Juste with Spell Fusion completely disabled.