Co-op Overview

Co-op is a game mode in 100% Orange Juice! that originally debuted on July 25th, 2018 with the Beach Party event. It was later reintroduced to the game as a permanent mode on May 16th, 2019 with the Minions of the Master event.

Co-op is an alternate game mode where, instead of competing against each other, all 4 players must pick a special co-op role and work together as a team to defeat a raid-bossesque Co-op Boss, a fifth character on the map. Players will not be racing for norma against each other but will instead achieve norma together to be able to use cards, and to unlock their role's passive effects. Players need to defeat the boss to win the game, and they will lose if all of them are KO'd at the same time. As the mode relies on cooperation, it can be difficult to complete the event alone with purely CPU players, especially since utilizing the abilities of each co-op role is essential to the players' success.

Setup

To activate co-op mode, the player needs to toggle the icon located next to the board menu. This can be done in both custom singleplayer games and online games. The player can also join an online co-op lobby, by selecting the "Co-op" tab at the top of the online lobby list.

Important Changes

Before examining the particulars of the mode, below is a basic list of rule changes the player should be aware of:

• All players choose a co-op role during character selection. Players gain additional passives and abilities depending on their co-op role.
• During deck selection, all cards are assigned either 0, 2, or 5 deck points. The cards that may be chosen are limited based the player's current deck points. Some cards are also ineligible for co-op mode.
• Special co-op boards, made specifically for the mode, are available to play on.
• Field events cannot be enabled in this mode, and are instead replaced with mixers.
• The co-op boss plays alongside the other players as a 5th unit on the board.
• Instead of winning using norma, the game is won when the boss's HP reaches 0, and lost if all four players are KO'd at once.
• All stars, wins, norma levels, and  Home panels are shared between all 4 players.
• Both types of norma checks (stars & wins) are simultaneously enabled.
• Players will lose only 1/8 of their stars on KO.
• Characters with positive ATK have an increased REC stat, calculated by the formula [base REC] + [base ATK].
• The effects of some cards and character passives are altered.
•  Bonus panels are not capped at level 3.
•  Encounter panels have different enemies, which vary depending on the Boss.
• Stars norma requirements are multiplied by 1.5, and Wins norma requirements are multiplied by 2.

Level	Stars	Victories
2☆	15	2
3☆	45	4
4☆	105	10
5☆	180	18

Character Changes

To prevent complete character bias, co-op makes adjustments to all character stats and some character passives. While these changes do make certain characters more or less viable than they usually would be, the changes are generally to make the characters conform with co-op mode.

REC Change

In co-op mode, characters with a positive ATK stat have increased REC stats. For these characters, the stat is calculated by the formula: [base REC + base ATK]. Characters with a neutral or negative ATK stat have unchanged REC stats. Shifu Robot's REC stat also remains unchanged, due to its passive.

For some characters, this results in a REC higher than 6, meaning the character needs to roll a 6 to revive for more than one turn. For instance, a character with 7 REC will need to roll 6 to revive for two chapters before it increments down to 5 or higher.

REC	Characters
9	Tomomo (Sweet Eater)
8	Tomomo, Store Manager
7	Yuki, Flying Castle, Star Breaker, NoName
6	Suguri, Hime, Sora, Marc, Kai, Sherry, Sora (Military), Miusaki, Yuki (Dangerous), Suguri (Ver.2), Mira, Islay, Sumika, Ellie, Marc (Pilot), Alicianrone, Arnelle
5	Peat, Seagull
4	Tomato

Passive Changes

• Chicken, Robo Ball, Seagull, and Mimyuu lose the same amount of Stars on KO as everyone else.
• Flying Castle can counterattack when landing on a  Boss panel, even if it attacks second.
• Tequila's passive will not summon Pirate Crew Members on  Encounter panels.
• Tequila's +1 ATK per damage taken passive does not stack with the Avenger role, meaning the player will only receive +1 per HP lost, not +2.
• Natsumi's same-panel passive will trigger with any unit as normal, but only players will receive the healing effect.
• Mira's Binding Smoke passive will not affect players.
• Islay's passive applies to enemy units instead of other players.

Field Changes

As previously mentioned, special boards are available in co-op. The board selection depends on which boss and difficulty the player chooses.

Board Panels

Most boards in co-op feature a special panel for the boss to start the game on.

Icon	Name	Effect
	Boss Home Panel	The boss starts the game on this panel. Functions as a  Boss panel when stepped on.

When playing on a board that does not feature a Boss Home panel, the boss starts the game on the rightmost end of the lowest row of panels. This location is based on an orthogonal view of the board, rather than the player's in-game view. For example, when playing on the Practice Field board shown to the right, the boss starts the game on the lowest bonus panel.

Field Events

Although most field events are replaced with mixers, co-op features 1 unique field event designed to make the boss harder the longer the game progresses. This field event is permanently active and cannot be turned off.

Name	Chapters	Effect
Terror	2	Random  Boss panels spawn around the board. The amount of spawned panels increases as the game progresses. This effect lasts for the duration of the Chapter and does not affect  Home,  Warp, or  Warp Move panels. At the start of chapter 40, effect frequency increases from every 2 Chapters to every Chapter, and  Boss panels spawn everywhere except for  Warp and  Warp Move panels.

The Boss EncounterBoss Encounter
When Norma level 4 is achieved for the first time by any player, all Encounter panels on the map will be replaced with Boss panels. While Boss Encounter is in effect, any player who stops on a Boss panel will battle the Boss unit. This event will continue until the Boss unit is defeated. event that occurs in other game modes does not occur in co-op, since boss panels spawn through Terror instead.

Home Sweeper

 Home Sweeper is a unique boss card played by the boss if it hasn't been defeated by chapter 40. Home Sweeper permanently removes home markers and  Home panels, allowing Terror to replace them with  Boss panels.

Card Changes

Certain card effects have been adjusted to target the boss instead of other players, and some have been completely reworked, especially hyper cards. Note that "opponents" refers to only the boss and its minions, and not the other players. Below is a comprehensive list of all changed cards. Any card not listed has remained unchanged:

Standard Cards

Card	Changes
Ambush	Will only affect opponents.
Dinner	Will only affect players.
Encore	Cannot be triggered by opponents.
Exchange	Cannot be triggered by opponents.
Indiscriminate Fire Support	Effect is limited to 1 active stock total (instead of 1 stock per player). Players do not take damage from the effect.
I Wanna See You	Cannot be triggered by opponents.
Sink or Swim	Is now Norma 2. Gives +10 stars and +1 Win instead of +50% stars.
Tragedy in the Dead of Night	Cannot be triggered by opponents.
Unpaid Work	Effect is now "While in effect, players cannot be forced to lose stars."

Hyper Cards

Card	Changes
Air Strike	Renamed to "Air Support", and the effect is "During their next battle, all players gain +2 DEF."
Angel Hand	Can only target players.
Another Ultimate Weapon	Gives +1 ATK and +1 DEF for every 10 stars spent instead of 20 and will not consume stars past the amount it takes to get to +9 ATK.
Banned for Life	Effect is now "When used, the Boss will skip its next action." (Boss will still move but won't play its next card)
Big Bang Bell	Damage-dealing effect will only affect opponents. When placed, visible to all players.
Binding Chains	Will only affect opponents. (Boss won't move but will still play cards)
Blazing!	Will only affect players, and the -1 DEF effect will only apply to players who are Kae. Only lasts 2 turns.
Cooking Time	Will only affect players, and no longer gives stars.
Dance, Long-Eared Beasts!	Cannot be triggered by players. When placed, visible to all players.
Delta Field	Now a battle card, and effect has been changed to "During this battle, the opponent gains the following effect: All dice rolls will be 1."
Devil Hand	Will only target opponents, and will reduce HP by a maximum of 5 (down to 1 HP).
Do Pirates Fly in the Sky?	Effect is now "Summon 2 Pirate Crew Members to fight a random enemy. Enemy goes second."
Evil Spy Work - Execution	Now heals two HP.
Extended Photon Rifle	Will only target opponents.
Final Surgery	Gives -2 REC to players KO'd by its effect.
Full Speed Alicianrone	Damage will only be dealt to opponents.
Gamble!	Effect is now "Randomly deal your current max health in damage to either yourself or the boss."
Golden Egg	Effect is now "Gain level x 10 stars." Stars will go to the players even if triggered by an opponent.
Immovable Object	Stopping effect will only affect opponents.
Invisible Bomb	Now deals 4 damage. Cannot be triggered by players. When placed, visible to all players.
Jonathan Rush	Can only target opponents.
Leap Through Space	Binding Smoke will only affect opponents.
Leap Through Space (Marking)	Now transforms into the co-op version of Leap Through Space.
Magical Inferno	Deals 5 damage to targets instead of directly KOing them. Will only affect opponents.
Magical Massacre	Cost is 40, and its effect has been changed to "For each KO'd ally, deal 3 damage to all enemies."
Magical Revenge	Will only affect opponents.
Melting Memories	Cost is Stars / 10, and its effect has been changed to "The Boss will skip its next action." (Boss will still move but won't play its next card)
Miracle Red Bean Ice Cream	Now transforms into the co-op version of Magical Revenge.
Overseer	Can only be used as a Battle Card, and its effect has been changed to "Opponent fights Shifu Robot instead. Can only be used against the Boss."
Plushie Master	Now places the co-op version of Dance, Long-Eared Beasts!.
Present for You	No longer gives stars.
Protagonist's Privilege	Now allows the player to always attack first in battle, in addition to its usual effects.
Raging Madness	Effect is now "Gain +1 Rage Counter and go into Raging Mode. During Raging Mode, gain +X/2 ATK and +X/2 EVD rounded up, where X is the number of your Rage Counters. At the start of your turn, lose 1 Rage Counter. Raging Mode ends when Rage Counters are 0."
Rbit Hobby Shop	No longer steals stars. Cannot be triggered by opponents.
Revival of Stars	Cannot transform  Boss panels.
Rival	Can only target opponents.
Santa's Job	No longer applies the Santa's Gift debuff.
Self-Destruct	Now deals the user's max HP as damage to the enemy.
Special Stage	Star-stealing effect will only affect opponents.
Star Blasting Fuse	Now places the co-op version of Invisible Bomb.
Stealth On	Now makes the user unable to be targeted by Boss abilities.
Sweet Guardian	Effect is changed to "Receive 2 Pudding cards. These cards are removed from game upon use or discard."
True White Christsmasher	Will only affect opponents.
Ubiquitous	Can only target opponents, and now steals stars equal to 10 times the user's level.
Waruda Machine, Blast Off!	Effect is now "During this battle, gain +1 ATK, +1 DEF, and -1 EVD for every two cards your allies are holding."
Whimsical Windmill	Now makes the user fight the Boss.
White Christsmasher	Will only affect opponents.
x16 Big Rocket	Can only target opponents.