Battle system

The battle system in OMORI is similar to the combat of the traditional turn-based JRPGs which the game takes inspiration from, with the use of plugins to create additional mechanics to control the flow of the battle, like emotions and follow-ups.

Stats

Most stats remains unchanged compared to the expected behaviour, save from some renames and small differences, as seen below:

Heart: It's the normal "HP" or "health points" value we see in other JRPGs, it's the amount of health the character have, the character becomes "toast" (the game equivalent of a "KO" state) if it reaches 0, except Omori, who if ever reaches 0 heart it will bring up the "game over" screen.
Juice: It's the normal "MP" or "mana points" value we see in other JRPGs, it's the amount of mana the character have, most skills costs juice to use, the character is unable to use skills that uses more mana than it have. Only the party members use juice for their skills, enemies uses their juice solely as shields when sad, more on that later.
Attack: Attack works as predicted, it decides the amount of damage most attacks does, with very few exceptions, like Kel's "run'n gun" or Aubrey's "last resort".
Defense: Defense works as predicted, decreasing damage taken by attacks and skills, note that there are skills that bypass defense.
Speed: Speed substitute the usual "agility" value we have in other games, however in OMORI it only affects three things: who will act first, some skills formulas and the chances of running away from battle.
Luck: Luck controls the critical hit rate, each point in luck is 1% critical rate, however, luck does not increase when levelling up.
Hit rate: Hit rate dictates how often a attack hits or miss, with the exception of Sunny with 75% hit rate, the default hit rate for the party members is 0%, enemies mostly have a 95% hit rate.
Critical hit: The chance to "hit right in the heart" as the game puts, as stated before, it's a % chance based on flat luck, each point in luck increase critical hit rate by 1%. Hitting right in the heart increase the base damage dealt by the attack by a value between 50% and 100%, if the base damage's lower than 0, hitting right in the heart will always deal two damage instead.

Equipment

Weapons

Weapons are the characters is main form of attacking, granting the hit rate needed so the characters can hit something, the player is only able to change the weapon of the dream world cast, excluding Omori. Each characters use different types of weapons, as seen below:

Omori uses knives to attack, while Sunny uses the Steak Knife, his own hands or the Violin.
Aubrey, while in Headspace, uses a variety of blunt-force weapons, such as hammers, bats, and pillows. In the real world, she wields her Nail Bat.
Kel, while in Headspace, uses various types of balls as weapons. In the real world, he uses his Basketball.
Hero, while in Headspace, uses cooking and serving utensils, like pans and spatulas. In the real world, he uses his fist.

Charms

Charms are equippable itens shared between all characters, each character can carry one charm, which will grant a variety of different effects, like increasing stats, granting emotions or immunity to it, changing battle rewards, etc.

Battle actions

During battle, there is a set of actions the player can take at the beggining of the turn, these are:

Attack

The default attack option shared with all party members, doing an attack allow the use of follow-ups when pressing the movement keys in direction of a living party member. Attack always have the same formula of doing double the character's attack minus the target's defense.

Skills

Each character have access to a variety of skills that they can use, however only four skills can be used at the same time, including the ability to guard attacks, below is an abstract for each character's skills, a more complete list can be seen at the character page, keep in mind that every skill that apply emotions and buffs can be applied again to increase the tier.

Dream world

	Description	Source
Sad Poem	Inflicts sad on a friend or foe. Costs 5 .	Basic
Guard	Acts first, reducing damage taken by 50% for 1 turn. No Cost.	Basic
Stab	If Omori is sad, depressed or miserable it will use this formula: 2 * ATK. Else, it will use 1.5 * ATK - DEF. It always hit right in the heart. Costs 13 .	Level 3
Bread Slice	Deals 2.5 * ATK - DEF, if it's a killing blow, gain bread. Costs 10 .	Level 5
Mock	Deals 3 * ATK - DEF, if the target is on any tier of angry, it will decrease its attack value by 3 tiers. Costs 20 .	Level 7
Hack Away	Deals, three times, 2 * ATK - DEF, whatever, if Omori is in any tier of angry, it will do 2.25 * ATK - DEF instead. Costs 30 .	Level 10
Observe	At the end of the turn, apply either a "single target" or a "multi target" state to the target, forcing it to use either a single target attack or a multi target attack for two turns, this can vary from enemy to enemy, and can be seen better at the enemy articles. No cost.	Shawn
Lucky Slice	If Omori is in any tier of happy, it will do (ATK + LCK) * 2 - DEF, else it will do (ATK + LCK) * 1.5 - DEF. Costs 15 .	Level 12
Trick	Deals 3 * ATK - DEF damage, if target is on any tier of happy, it decrease its speed by 3 tiers. Costs 20 .	Level 15
Painful Truth	Deals 2 * ATK - DEF damage, and inflicts sad to Omori and his target. Costs 10 .	Level 19
Shun	Deals 3 * ATK - DEF to the target, if the target is sad, it decreases its defense by 3 tiers. Costs 20 .	Level 20
Stare	Reduce the target is speed, attack and defense by one tier. Costs 45 .	Level 25
Exploit	Deals 3.5 * ATK - DEF if the target is affected by any emotion, else it will do 2.5 * ATK - DEF. Costs 30 .	Level 30
Final Strike	If Omori is on the first emotion tier, it will do 4 * ATK - DEF, if on the second emotion tier, it will do 5 * ATK -DEF, if on the last, 6 * ATK - DEF, if he is neutral, it will do 3 * ATK - DEF. Costs 50 .	Level 35
Red Hands	Deals 3 * ATK - DEF 4 times to a target. Costs 75 .	Hikikomori Route
Vertigo	Deals 3 * AGI - DEF to the all enemies, and decrease their attack by 3 tiers. Costs 45 .	Defeating Heights in the Hikikomori Route.
Cripple	Deals 3.5 * ATK - DEF to a target and decrease its speed by 3 tiers. Costs 45 .	Defeating Spiders in the Hikikomori Route.
Suffocate	Deals 400 damage to all enemies, and decrease their defense by 3 tiers. Costs 45 .	Defeating Drowning in the Hikikomori Route.

	Description	Source
Pep Talk	Turn a friend or foe happy. Costs 5 .	Basic
Guard	Act first, decrease damage taken by 50%. No cost.	Basic
Counter	Taunts all target, if hit by a single target skill, she will retaliate with a normal attack. Costs 5 .	Level 6
Twirl	Deals 2 * ATK + LCK - DEF to a target and turns Aubrey happy. Costs 10 .	Level 10
Team Spirit	Turns Aubrey and her target happy. Costs 10 .	Level 11
Power Hit	Deals 2 * ATK damage to the target, ignoring its defense, as well as decreasing its defense by one tier. Costs 20 .	Level 14
Mood Wrecker	Deals 3 * ATK - DEF if the target is happy, ecstasic or manic. Does 2.25 * ATK - DEF otherwise. Costs 10 .	Level 17
Wind-up Throw	Deals 3 * ATK - DEF if there is one enemy, 2.5 * ATK - DEF if there are two enemies alive, other will do 2 * ATK - DEF damage. Costs 20 .	Level 20
Mash	Deals 2.5 * ATK - DEF damage, if it's a killing blow, restore 100% of Aubrey's juice. Costs 15 .	Level 23
Beatdown	Deals 2 * ATK - DEF as damage to a single target 3 times. Costs 30 .	Level 27
Last Resort	Deals 4 * HP (Current HP, not max HP) as damage to an enemy, but turns Aubrey into Toast. Costs 50 .	Level 30
Headbutt	Deals 3 * ATK - DEF if Aubrey is angry or enraged, otherwise does 2.5 * ATK - DEF, damaging at up to 20% of her heart. Costs 5 .	Berly

	Description	Source
Annoy	Turns a friend or foe angry. Costs 5 .	basic
Guard	Acts first, reducing damage taken by 50% for 1 turn. No cost.	basic
Rebound	Deals 2.5 * ATK - DEF damage to all enemies. Costs 15 .	Level 4
Run 'n Gun	Deals 1.5 * AGI - DEF damage to a single target. Costs 15 .	level 9
Curveball	If the target currently have an emotion, it will do 3 * ATK - DEF as damage, else 2 * ATK - DEF. Regardless of emotion, it will randomly apply another or the same emotion. Costs juice 20 .	Level 10
Ricochet	Deals 3 * ATK - DEF, 3 times, to a foe. Costs 30 .	Level 16
Megaphone	Makes all friends angry. Costs 45 .	Level 20
Can't Catch Me	Multi target taunt for one turn, Decrease all foes' hit rate by 55% for two turns. Costs 50 .	Level 21
Rally	Restore 4 energy to the party and 30% juice to each party member besides himself, also turns himself happy. Costs 50 .	Level 26
Comeback	Makes Kel happy. If sad was removed, Kel gains Flex. Costs 25 .	Level 29
Tickle	Till the end of the turn, all attacks done to the target will hit right in the heart. Costs 55 juice.	Level 30
Flex	Increase Kel's hit rate by 1000% (making him unable to miss) and increase the damage of the next damaging attack (including Juice Me) by 2.5 times. Costs 10 .	Pluto
Juice Me	Deals 25% of the friend is current heart as damage, but recover 40% juice, this damage is affected by both the Flex affect and emotion, but not the juice gained. Costs 10 .	Coconut
Snowball	If target is sad, it will do 3 * ATK - DEF damage, else it will do 2.5 * ATK - DEF and turn the target sad. Costs 20 .	Snowball

	Description	Source
Cook	Heals a friend for 75% of their heart. Can be used outside of battle. Costs 10 .	Basic
Guard	Acts first, reducing damage taken by 50% for 1 turn. No cost.	Basic
Massage	Removes a friend or foe's emotion. Costs 5 .	Level 2
Charm	Acts first, a foe targets Hero for 1 turn. Costs 10 .	Level 8
Smile	Acts first, decrease the target's attack by one tier. Costs 25 .	Level 10
Fast Food	Act's first, healing a friend for 40% of their heart. Costs 15 .	Level 13
Homemade Jam	Brings back a friend with 70% its heart. Costs 40 .	Level 16
Captivate	Acts first. All foes target Hero for 1 turn. Costs 20 .	Level 20
Enchant	A single target taunt that turns the target happy. Costs 15 .	Level 22
Share Food	Heals 50% heart of Hero and his target. Costs 15 .	Level 24
Mesmerize	A multi target taunts that also makes Hero Guard, decreasing damage taken by 50%. Costs} 30 {{MP}.	Level 28
Dazzle	Turns all foes happy and decrease their attack by one tier. Costs 35 .	Level 30
Snack Time	Heals all friends for 40% of their heart. Can be used outside of battle. Costs 25 .	Baking Pan
Tea Time	Heals 30% of the target's heart and 20% of its juice. Costs 25 .	Teapot
Spicy Food	Deals 2 * ATK - DEF to the target and turns it angry. Costs 15 .	Man on Fire
Refresh	Heals 50% of a friend's juice. Costs 40 .	Blender
Tenderize	Deals 4 * ATK - DEF damage to a target and decrease its defense by one tier. Costs 30 .	Tenderizer
Gator Aid	Increase all the party members' defense by one tier. Costs 15 .	Gator Guy (Artist)

Real world

	Description	Source
Guard	Acts first, reducing damage taken by 50% for 1 turn. No cost.	Basic
Calm Down	Acts first, remove emotions and heals 50% . No cost.	Encountering Something in the Dark
Focus	Acts first, Multiply damage done on the next attack by 2.5 times No cost.	Encountering Something in the Walls
Persist	Acts first, heals 20 , user's heart will not drop below 0 till the end of the turn. No cost.	Encountering Something in the Water
Overcome	Gather all your courage. No cost.	Encountering Something
Allegro	[0.15 * b.mhp + a.atk - b.def], 3 times. Costs 19 .	EncounteringOmori
Encore	Your will not fall for 3 turns. No cost.	EncounteringOmori
Cherish	Increase speed, attack and defense by one tier. No cost.	EncounteringOmori

	Description	Source
Guard	Acts first, reducing damage taken by 50% for 1 turn. No cost.	Basic
Homerun	[4 * a.atk - b.def], with 10% chance of instantly defeating the enemy. Aubrey also takes 20% of the damage.	Basic

	Description	Source
Guard	Acts first, reducing damage taken by 50% for 1 turn. No cost.	Basic
Encourage	Increase Sunny's attack by three tiers.	Basic

	Description	Source
Guard	Acts first, reducing damage taken by 50% for 1 turn. No cost.	Basic
First aid	Heals target for 25% . Costs 10 .	Basic

Snacks

Snacks can restore the Heart or Juice of one or all party members. Certain snacks can also revive party members who are Toast, or applying some buffs.

Toys

Toys are one-use items, typically causing a debuff or emotion. They can be used on enemies, and sometimes on party members.

Run away

As the name suggests, this action is for running away from combat. the chance to escape is based on this formula: [0.65 * $gameParty.agility() / $gameTroop.agility()], in other words, the speed value of all the party members combined, multiplied by 0.65, divided by the speed of the enemy troop. Whenever a failed attempt's made, an additional 10% chance is added.

Battle mechanics

Energy

Energy is a resource gained whenever one of the party members are hit by any attack, the party starts with 4 energy with an maximum of 10 energy, and consume 3 energy to use follow-ups and 10 energy for using the ultimate "release energy" follow-up.

Follow-ups

As stated before, follow-ups can be used after an attack's made and each party member have a different set of follow-ups, it changes as the player advances throughout the game, ranging from level one to three:

Description	Level one	Level two	Level three
Omori walks forward reading his blade to strike the enemy again.	[2 * a.atk - b.def].	[(2 * a.atk + a.luck) - b.def].	[(2 * a.atk + a.luck) - b.def], twice.
Omori walks forward and trips the target.	[a.atk + a.luck - b.def], decrease speed by one tier.	[a.atk + a.luck - b.def], decrease speed by two tiers, also turning the target sad.	[a.atk + a.luck - b.def], decrease speed by three tiers, also turning the target sad.
Omori and his friends launch their ultimate attack, needs the entire party alive.	[300], unable to hit right in the heart, also increase everyone's stats by 25%.	[600], unable to hit right in the heart, also increase everyone's stats by 25%.	[1000], unable to hit right in the heart, also increase everyone's stats by 25%.

Description	Level one	Level two	Level three
Aubrey look at Omori to grab his attention...	[(2 * a.atk + a.luck) - b.def].	[(3 * a.atk + a.luck) - b.def].	[3 * a.atk + a.luck].
Aubrey look at Kel, who eggs her back.	Turn Aubrey angry.	Turn Aubrey and Kel angry and increase Aubrey's attack by one tier.	Turn Aubrey and Kel furious, and increase Aubrey's attack by one tier.
Aubrey looks at hero, who tells her to focus and cheer up!	Turn Aubrey happy and increase her defense by one tier.	Heals 25% , turn Aubrey happy and increase her defense by one tier.	Heals 75% and 50 , turn Aubrey ecstatic and increase her defense by three tiers.

Description	Level one	Level two	Level three
Kel passes his ball for Omori to catch...	[1] damage to Omori... also turns him sad.	[(1.5 * Omori.atk) + (1.5 * kel.atk) - b.def], also turn Omori happy.	[(2 * Omori.atk) + (2 * kel.atk) - b.def], also turn Omori ecstatic.
Kel passes his ball to Aubrey and she knock it out of the park!	[Aubrey.atk + kel.atk - b.def].	[(2 * Aubrey.atk) + kel.atk - b.def].	[(2 * Aubrey.atk) + (2 * kel.atk) - b.def].
Kel passes his ball to Hero to dunk on the foes!	[Aubrey.atk + kel.atk) - b.def], to all enemies.	[Aubrey.atk + (1.5 * kel.atk) - b.def], to all enemies.	[(1.5 * Aubrey.atk) + (1.5 * kel.atk) - b.def], to all enemies and decrease their attack by one tier.

Description	Level one	Level two	Level three
Hero signal Omori to do an attack!	Heals Omori by 15% and force him to do a normal attack.	Heals Omori by 25% and 10% and force him to do a normal attack.	Heals Omori by 40% and 20% and force him to do a normal attack.
Hero encourages Aubrey to do an attack!	Heals Aubrey by 15% and force her to do a normal attack.	Heals Aubrey by 25% and 10% and force her to do a normal attack.	Heals Aubrey by 40% and 20% and force her to do a normal attack.
Hero psyches up Kel!	Heals Kel by 15% and force him to do a normal attack.	Heals Kel by 25% and 10% and force him to do a normal attack.	Heals Kel by 40% and 20% and force him to do a normal attack.

Buffs & debuffs

Buffs and debuffs works similar to what is expected in other JRPG, the most common buffs/debuffs, speed, attack and defense lasts for six turns and stacks up to three times, while the uncommon ones, like sno-cone and the release energy buff, does not stack and last till the end of the battle. In order to keep track of all that, the game makes use of several states, one for each tier of the buffs, when a state already applied is applied again, it removes the current tier and gives another advanced tier, for example, using "Gator aid" will give everyone a "defense up 1", buffing again will remove "defense up 1" and apply "defense up 2", and so on, if a buff is already at max tier it will instead just reapply itself.

Below is a list of all major buffs and debuffs.

There are more buffs used by bosses, these are a lot and may be added later on.

Buff	Tier one	Tier two	Tier three
Attack up	Increase attack by 10%.	Increase attack by 25%.	Increase attack by 50%.
Defense up	Increase defense by 15%.	Increase defense by 30%.	Increase defense by 50%.
Speed up	Increase Speed by 50%.	Increase Speed by 100%.	Increase Speed by 400%.
Sno-cone	Increase speed, attack, luck and defense by 20%.
Release energy	Increase speed, attack, luck and defense by 25%.

Debuff	Tier one	Tier two	Tier three
Attack down	Decrease attack by 10%.	Decrease attack by 20%.	Decrease attack by 30%.
Defense down	Decrease defense by 25%.	Decrease defense by 50%.	Decrease defense by 75%.
Speed down	Decrease speed by 20%.	Decrease speed by 50%.	Decrease speed by 75%.

Emotions

Hero's emotion guide.

Emotions are a type of state that gives the character some buffs and debuffs, they also give an "element" to their attack that makes it stronger or weaker to other emotions states, with three tiers for each emotion. It follows the following rules:

Normal enemies and most bosses can only have tier 1 emotion.
Party characters can only have up to tier 2 emotion, and can only have the first tier of afraid.
Only Omori and some bosses can have tier 3 emotions. Omori is also immune to afraid.
Sunny can only be afraid, stressed out, angry and sad, other real world friends follows the same rules as their dream world counterpart.

While under the effect of an emotion, the character does more damage to one emotion and takes less damage from another, following the pattern that can be seen in Hero's Emotion chart at the side, which is:

Angry is strong against sad.
Sad is strong against happy.
Happy is strong against angry.

The emotion resistance and weakness values are as follow:

* Emotion Resistance: Takes 20% / 35% / 50% less damage.
* Emotion Weakness: Deals 50% / 100% / 150% more damage.

As an example, an attack done to a ecstatic party member from an angry source will deal 65% damage, while an attack done to the angry foe from an ecstatic source will deal 200% damage instead of 100%.

Emotion tiers

Happy		Ecstatic		Manic
	Increase luck by 100%. Increase speed by 25%. Decrease hit rate by 10%.		Increase luck by 200%. Increase speed by 50%. Decrease hit rate by 20%.		Increase luck by 300%. Increase speed by 100%. Decrease hit rate by 30%.

Angry		Enraged		Furious
	Increase attack by 30%. Decrease defense by 50%.		Increase attack by 50%. Decrease defense by 70%.		Increase attack by 100%. Decrease defense by 85%.

Sad		Depressed		Miserable
	Increase defense by 25%. Decrease speed by 20% 30% of the damage taken is done to instead.		Increase defense by 35%. Decrease speed by 35%. 50% of the damage taken is done to instead.		Increase defense by 50%. Decrease speed by 50%. 100% of the damage taken is done to instead.

Afraid		Stressed out
	Increase damage taken from all emotions by 50%, including afraid. Does not apply emotion damage like other emotions. Blocks the use of skills and follow-ups.		Blocks the use of skills. Does not apply emotion damage like other emotions. Increase attack by 20%. decrease defense by 10%.

Boss specific emotions

Bosses that have advanced tiers of emotion, these being Sweetheart, captain Space Ex-Boyfriend and the Unbread Twins, use different emotion trees compared to the player once they become emotion locked, it follows slightly different rules, as seen below:

Happy		Ecstatic		Manic
	Increase luck by 100%. Increase speed by 25%. Decrease hit rate by 10%		Increase luck by 200%. Increase speed by 50%. Decrease hit rate by 20%. Emotion resistance/weakness remain the same as happy.		Increase luck by 300%. Increase speed by 100% Decrease hit rate by 30%. Emotion resistance/weakness remain the same as happy.

Angry		Enraged		Furious
	Increase attack by 20%. Decrease defense by 10%.		Increase attack by 50%. Decrease defense by 50%. Emotion resistance/weakness remain the same as angry.		Increase attack by 100%. Decrease defense by 70%. Emotion resistance/weakness remain the same as angry.

Sad		Depressed		Miserable
	Increase defense by 25%. Decrease speed by 20%. 30% of all damage taken is done to instead.		Increase defense by 35%. Decrease speed by 35%. 50% of all damage taken is done to instead. Emotion resistance/weakness remain the same as sad.		Increase defense by 50%. Decrease speed by 50%. 100% of all damage taken is done to instead. Emotion resistance/weakness remain the same as sad.

Plot armor

After triggering plot armor.

When taking an actual killing blow.

Plot armor is the mechanism that forbids Omori from dying when being victim of a killing blow once per battle, which gives the message “Omori did not succumb” instead, it’s a simple “immortal” state that’s given to Omori, once a damage that would take him below 1 is done, the immortal state’s set to be removed in the end of the turn, meaning that all damage taken till the end of the turn will still not kill him.

Prior to patch 1.0.8, the game used to check heart value at the end of the turn to determine if Omori should or should not disable his plot armor, if Omori had more than 5% by the end of the turn (for example, by the use of a healing item after the “killing blow” was taken), it was possible to keep the immortal state indefinitively, as long as Omori never ended a turn with less than 5% .

Trivia

Aubrey and Kel’s interaction only buffs Aubrey’s attack, despite the animation showing on both.

The damage calculation for Kel's pass to Hero has an oversight, it uses Aubrey's attack stat again instead of Hero's.