Co-op Overview

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

Co-op Mode is a 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 powerful Co-op Boss, who functions as a fifth character on the map. Players will not be racing for Norma against each other, but will instead achieve Norma together in order to raises their stats and use stronger cards. Players must defeat the boss to win the game, and will lose if all of them are KO'd at the same time. Utilizing the abilities of each co-op role is essential to the players' success.

Setup

To switch to Co-op Mode, the player must 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:

• Along with selecting a board, the host must also select a co-op boss and difficulty before the game starts.
• Special co-op boards, made specifically for the mode, are available to play on (depending on the selected difficulty).
• Field events cannot be enabled in this mode, and are instead replaced with mixers.
• All players choose a co-op role during character selection. Characters gain additional passives and abilities depending on their co-op role.
• Characters with a base ATK above 0 have an increased base REC stat, calculated by the formula [base REC] + [base ATK].
• The effects of some cards and character passives are altered.
• During deck selection, all cards are assigned either 0, 2, or 5 deck points. The combination of cards that may be chosen are limited based the player's current deck points. Some cards are also ineligible to be decked in Co-op Mode.
• 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 the same time.
• All stars, wins, norma levels, and ability to stop at  Home panels are shared between all 4 players.
• Chapter star bonus is accumulated in the shared star pool, rather than being gained by each player individually.
• Both types of norma checks (stars & wins) are simultaneously enabled.
• Every player's hand is visible to all other players.
• Players will lose only 1/8 of their stars on KO.
•  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. Norma level 6 cannot be achieved in this mode.

Level	Stars	Victories
1☆	15	2
2☆	45	4
3☆	105	10
4☆	180	18

Character Changes

Co-op Mode makes adjustments to some characters' stats and passives, both to adapt characters to the mode's unique mechanics, as well as to prevent certain characters from being overpowered in the mode.

REC Changes

In Co-op Mode, characters with a base ATK stat above 0 receive an increase to their base REC stat. For these characters, the new REC stat is calculated by the formula: [base REC + base ATK]. Characters with a base ATK stat of 0 or below 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, Hoshino Reika, Mio (Festive), Dark Lulu
6	Suguri, Hime, Sora, Marc, Kai, Sherry, Sora (Military), Miusaki, Yuki (Dangerous), Suguri (Ver.2), Mira, Islay, Sumika, Ellie, Marc (Pilot), Alicianrone, Arnelle, Hime (Moonlight), Malt, Pomeranius, Kai (Hero)
5	Peat, Seagull, Mimyuu (Jailbird), Hyper Ellie
4	Tomato

Passive Changes

Some characters have had their passives adjusted in Co-op Mode.

• Shifu Robot now revives after 2 turns instead of 1 turn, and no longer gains -1 MOV for 2 chapters after reviving.
• Shifu Robot has an additional Burn Out passive: Gain a stack of Burn Out after you revive. Recovery is delayed for 1 turn for each stack.
• Kae no longer gains -1 DEF when attacking.
• Natsumi's same-panel passive will not trigger against nor heal enemies.
• Sora (Military) has an additional Burn Out passive: Gain a stack of Burn Out after you revive from a battle KO. Recovery is delayed for 1 turn for each stack.
• Sweet Breaker now gains +1 to ATK, DEF, and EVD if the opposing unit is inflicted by Melting Memories.
• Miusaki now takes no more than half her max HP in damage when defending (rounded up).
• Fernet (Noble)'s passive applies to enemy units instead of other players, will steal stars equal to the player's level, and will no longer prevent challenges if the star cost can't be fully paid.
• Watty's passive now gains 1 stack of Hardened Scales for every 2 points of damage reduced by using Defend.
• Dark Lulu now loses only Lvl x1 stars when denying challenges.

Passive Interactions

Other characters have mostly unchanged passives, but have unique interactions with the various different systems in Co-op Mode.

• Chicken, Robo Ball, Seagull, Mimyuu, and Tomato lose the same amount of Stars on KO as everyone else.
• Flying Castle can counterattack when triggering a  Boss panel, even if it attacks second.
• Star Breaker, Cuties, and Hoshino Reika do not have both types of norma checks enabled, and cannot personally redeem their restricted norma type for the team.
• Tequila will not summon Pirate Crew Members on  Encounter panels.
• Tequila's +1 ATK for every lost HP passive does not stack with  Avenger, meaning the player will only receive +1 per HP lost, not +2.
• Nico's passive affects chapter star bonus as usual; however, if there are two or more Nico players in the game, the amount of additional stars gained is determined by the Nico player with the most Gift cards in hand.
• Mira's Binding Smoke passive will not affect players.
• Suguri (46 Billion Years)'s damage-doubling passive now applies to different cards, depending on their co-op effects.
• Shifu's battle damage passive applies to the special Robo Ball encounters when fighting M10 Robot.
• Shifu's wins passive does not apply to KO's achieved by Robo Ball encounters or Robo Pals from  Ideal World.

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 Mode 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.

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 special Hyper 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

Effect Changes

Many card effects have been changed for Co-op Mode. While some of them have been completely reworked, others have simply been adjusted to only work on the boss and its minions instead of other players, and vice versa.

Standard Card	Changes
Bank of Poppo	New effect: "Boss loses Chapter number x2 stars, Chapter number x2 stars are deposited on this trap, and the trap stays on the board. The second unit to trigger this trap receives the lost stars."
Contest of Cuteness	Now steals stars equal to 5 times the player's level. Cannot use against players.
Deceptive Disarming	New effect: "If you do not suffer KO in this battle, cancel next Boss card activation. Can only be used against the Boss."
Dinner	Will only affect players.
Forced Revival	Now Max 1. Now revives units at half their max HP, rounded up.
Freight	Now a Boost card New effect: "When stopping on your Home panel, discard this card and gain 5 Stars. This card is discarded upon use."
Gentleman's Battle	Can only target 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.
Mio's Christmas Cake	Can only target players. Now causes the user to gain 2 HP when the user targets themself.
My Wild Friends	The summon's HP gain is now 2. The summon now gives 100% of the stars it gains to the summoner.
Pet Snacks	New effect: "Boss and all active minions gain -1 ATK in their next battle. This effect can stack."
Poppo the Snatcher	Now steals stars equal to 3 times the player's level. Will only affect opponents.
Rebellion	Now lasts 2 chapters. New effect: "While Boss HP is greater than the sum of all players' HP, all players will receive +1 ATK, +1 DEF, and +1 EVD at the start of the battle against the Boss."
Sink or Swim	Now Level 2. Gives +10 stars and +1 Win instead of +50% stars.
Unpaid Work	New effect: "While in effect, players cannot be forced to lose stars."

Hyper Card	Changes
Affluence (X)	Now makes the user fight the Boss. The battling effect can now be used at any level instead of just Affluence (4). Upgrading Affluence level is now an alternate use. Grants -(X) ATK to the Boss, where X equals the Affluence level. Steals (X) x 20 stars if not KO'd, where X equals the Affluence level.
Air Strike	Now deals only 1-2 damage. Will only affect opponents.
Another Ultimate Weapon	Gives +1 ATK and +1 DEF for every 10 stars spent (instead of every 20). Will not consume stars past the amount it takes to get to +9 ATK.
Banned for Life	New effect: "When used, the Boss will skip its next action."
Beast Witch	New effect: "Prevent star loss caused by a Boss or its minion. Discard this card if this effect is triggered."
Big Bang Bell	Will only affect opponents. Now placed face-up, making it visible to all players.
Binding Chains	Will only affect opponents.
Blazing!	Now applies +1 ATK to players and -1 DEF to opponents. Only lasts 2 chapters.
Christmas Inferno	Cost is now 40 stars. Deals damage equal to X to the boss, and equal to X/2 rounded up to all minions, where X is the amount of HP the user lost. Will only affect opponents. Now gives a number of Mio's Christmas Cake cards equal to the number of KO'd allies.
Cooking Time	No longer gives stars. Will only affect players.
Dance, Long-Eared Beasts!	Cannot be triggered by players.
Delta Field	Now a Battle card. New effect: "During this battle, the opponent gains the following effect: All dice rolls will be 1."
Devil Hand	Deals damage instead of reducing HP, and will deal a maximum of 5 damage (down to 1 HP). Will only affect opponents.
Do Pirates Fly in the Sky?	New effect: "Summon 2 Pirate Crew Members to fight a random enemy. Enemy goes second."
Evil Spy Work ― Execution	Now heals 2 HP.
Final Surgery	Gives -2 REC to players KO'd by its effect.
Gamble!	New effect: "Randomly deal your current max health in damage to either yourself or the boss."
Golden Egg	New effect: "Gain Level x 10 stars." Stars will go to the players even if triggered by an opponent.
Goodest Boy	New effect: "Ignore Boss panels. When staying on a panel with another player at the end of either of your turns, both draw a card. You can neither challenge nor be challenged. Players may stop to Pet you."
Guidance of the Weathercock	Expires on KO, instead of when landing on the player's own Home panel. No longer restricts norma checks.
Ideal World	Now a Boost card. New effect: "Effect Duration: 2 Chapters. Choose an active player. Robotic units will fight in battle on behalf of that player. These robotic units will gain +1 ATK."
Invisible Bomb	Deals 4 damage instead of reducing HP. Cannot be triggered by players.
Lulu is an Unlucky Dragon	The three random effects are different: "Roll a die. All enemies lose the die number x (your Lvl) x2 stars, then you gain the same amount." "The Boss will skip its next action." "All enemies lose 3 HP."
Magical Inferno	Deals 5 damage to targets instead of directly KOing them. Will only affect opponents.
Magical Massacre	Cost is now 40 stars. New effect: "For each KO'd ally, deal 3 damage to all enemies."
Magical Revenge	Will only affect opponents.
Make-Believe Prison Break	No longer grants immunity to being targeted by Boost cards. No longer grants immunity to instant KO effects.
Melting Memories	Cost is now Stars / 10. New effect: "Scramble boss' current hand order. Inflicts Melting Memories to all enemies. Effect Duration: 3 Chapters. Effect expires on KO."
Overseer	Now a Battle card. New effect: "Opponent fights Shifu Robot instead. Can only be used against the Boss."
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	New effect: "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.
Rival	Can only target opponents.
Santa's Job	No longer applies the Santa's Gift debuff.
Self-Destruct	Deals damage equal to the user's max HP to the enemy, instead of directly KOing them.
Special Stage	No longer grants immunity to being targeted by Boost cards. Star-stealing effect will only affect opponents.
Star Collector	Now an Event card. New effect: "Effect Duration: 3 Chapters. Whenever a player gains stars from a panel or battle KO, they gain an additional Lvl x stars."
Stealth On	No longer grants immunity to being targeted by Boost cards.
Sweet Guardian	New effect: "Receive 2 Pudding cards. These cards are removed from game upon use or discard."
Sweet Indulgence	Now generates 3 random non-Hyper, Sweets type cards. Can only be triggered by players.
Sweet Paradise	Now places traps face-up, making them visible to all players.
Torrent of Magic	Deals damage equal to the user's level to the boss, and equal to half the user's level to all minions, instead of directly KOing them. Will only affect opponents.
True White Christsmasher	Will only affect opponents.
Twilight-Colored Dream	New effect: "All allies gain +1 ATK in battles when on a Boss panel. If an enemy moves onto a panel with a Battle card you set as a Trap, they must stop on that panel."
Ubiquitous	Now steals stars equal to 10 times the user's level. Can only target opponents.
Waruda Machine, Blast Off!	New effect: "During this battle, gain +1 ATK, +1 DEF, and -1 EVD for every two cards your allies are holding."
When My Slumber Breaks	Deals X+1 damage to the Boss, and half of that to all other enemies, rounded up, where X is the Waking count.
Whimsical Windmill	Now makes the user fight the Boss.
White Christsmasher	Will only affect opponents.

Effect Interactions

Some cards have unchanged descriptions, but have unique interactions with the various different systems in Co-op Mode.

Standard Card	Interactions
Ambush	Will only affect opponents.
Encore	Cannot be triggered by opponents.
Exchange	Cannot be triggered by opponents.
I Wanna See You	Cannot be triggered by opponents.
Passionate Research	The top 3 cards of the deck are now visible to all players.
Tragedy in the Dead of Night	Cannot be triggered by opponents.

Hyper Card	Interactions
Angel Hand	Can only target players.
Ellie's Miracle	Takes Norma completed by allies into account.
Extended Photon Rifle	Will only affect opponents.
Full Speed Alicianrone	Damage will only be dealt to opponents.
Immovable Object	Stopping effect will only affect opponents.
Jonathan Rush	Can only target opponents.
Leap Through Space	Binding Smoke will only affect opponents.
Observer of Eternity	The cards that are able to be generated are now determined using their co-op effect.
Plushie Master	Now places traps face-up, making them visible to all players.
Revival of Stars	Cannot transform  Boss panels.
Star Blasting Fuse	Placed bombs are now visible to all players.
x16 Big Rocket	Can only target opponents.