The Rey Mono expansion
Monkey King 2 - The expansion of the best board game of 2025
The expansion to Spain's most award-winning card game of 2025.
Rey Mono 2: Traición adds new layers of strategy with hidden identities, backstabbing, and advanced mechanics that will put your friendships to the test. Includes an exclusive 2-player duel mode!
- 2–8 players
- 10 min per game
- Ages 5+
- Ships in 48 hours · free shipping over €35; €3.99 below that
- Made in Spain, plastic-free
- Color-blind friendly
- Playable without Rey Mono, but even better together
Description
Rey Mono 2: Traición is the expansion that takes the Rey Mono phenomenon to the next level. More interaction, more strategy and more chaos… without losing its essence: learn to play in under a minute and stay hooked for hours.
It includes 38 new cards that multiply the possibilities: two-coloured monkeys that make pairs easier, cards that knock points off in one go, and crocodiles that can steal straight from other players' point piles. In this version, your points are never safe.
It can be played as an expansion to the original Rey Mono or on its own as a 2-player duel. It also comes with a cloth bag to carry both games comfortably.
Same fast pace. More decisions. More betrayal.
How do you play Rey Mono?
Three people explain it in under a minute. Videos start muted: tap to listen.
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Fer
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Roldán
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Sara
Rey Mono in 4 steps
Shuffle and deal
Deal 4 cards to each player and put the draw pile in the middle. On your turn: play a card and draw, or discard and draw.
Make pairs
Match monkeys of the same color on your side of the table and flip them over. That's your very own pile of points.
Mess with everyone else
Use special cards to boost your score or, even better, to sabotage whoever's in the lead.
Be the Rey Mono
Most points at the end? Congrats! Claim the Tarjeta dorada and get perks in the next game.
Works at any table
Designed to bring 3 generations to the same table without anyone getting bored. Dinners, post-meal hangouts, trips, birthdays, classrooms. If there are people, there's a game.
- Works from age 5
- 2–8 players
- 10 min
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For family game time
No screens, no "this is too grown-up" or "this is too childish" arguments. Works from age 5, after any family meal.
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For game night with friends
Show up, pull it out, and within 1 minute everyone's in. The one who "isn't into games" won't want to stop.
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For playing with everyone
In class, at summer camp, at birthday parties, or as a gift. Explained in 60 seconds, no batteries needed, and nobody gets left out.
What's in the box
Everything new the expansion brings: 38 cards and a cloth bag.
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Monkey cards
24 cardsTwo new characters with split backgrounds, half one color and half another, and values from 2 to 10. Matching just one of the two colors is enough to make a pair.
- Roldo×12
- Jaiden×12
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Character cards
4 cardsFour crocodiles: on your turn, play one on another player, look through every card in their points pile, and keep whichever one you want.
- Cocodrilo Paco×1
- Cocodrila Yoli×1
- Cocodrilo Juan×1
- Cocodrila Carmen×1
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Bonus cards
5 cardsThe harshest bonus in the game: the Agujero Negro sucks up 8 points in one go.
- Agujero Negro (−8)×5
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Special cards
5 cardsPlay it on another player and steal a random card from their hand, no peeking.
- Despiojar×5
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Other components
1 bagKeeps all the base game and expansion cards together, and it's handier than the box for taking on the go.
- Cloth bag×1
People love Rey Mono 2
5/5 on Amazon · 5 verified reviews
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Super
«Super fun and entertaining, plus everyone can play»
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If you liked Rey Mono, buy the Rey Mono 2 expansion without a second thought
«I'm a huge Rey Mono fan, and this expansion, without a shadow of a doubt, makes the game way more fun and addictive. I've played it several times with my friends and my partner, and every game is better than the last. This expansion is a must to make the game much more dynamic.»
Want it all?
Get the complete Rey Mono universe
Rey Mono + Rey Mono 2: Traición. Traición adds 38 cards and 2 new characters that multiply the chaos at the table.
The perfect all-in-one gift — or for anyone who already knows their crew is about to get hooked.
€35,00
€36,80
Free shipping
The perfect gift
For €16.90, the perfect gift for anyone who already has Rey Mono: 38 new cards, four crocodiles, and a whole lot more betrayal. Made in Spain, plastic-free.
- Birthdays
- Christmas
- Secret Santa
Frequently asked questions
Grouped by topic. Looking for something specific? Start here.
Is Rey Mono suitable for color-blind players?
Yes. The game is designed so that information doesn't rely on color alone: the monkeys can also be told apart by their shape and features, so color-blind players compete on equal terms.
How many players, and how long does a game take?
2 to 8 players, about 10 minutes per game. Kids can play from age 5 with a few simple adaptations, and with an adult at the table they play just fine.
Can young kids play?
Yes, from age 5 with a few simple adaptations: the rules are short and the cards are distinguished by color and shape, so a 5-year-old can easily play with a grown-up. See below for how to adapt it.
Can Rey Mono be adapted for little ones?
Yes, and that's exactly what we do. Depending on age, take out the special cards (Siesta, Liana, and Estampida) and the game becomes all about making pairs. If it still drags on, remove the bonus cards too: then it's just color matching, which is exactly what a five-year-old needs.
What language are the rules in?
The rulebook is in Spanish.
Do I need Rey Mono to play Rey Mono 2: Traición?
No. You can play Rey Mono 2: Traición without Rey Mono, but we recommend having both together for the best experience.
Where can I buy Rey Mono?
In the official Badan Studios store, and also on Amazon, Fnac, Carrefour, El Corte Inglés, and in specialist board game shops.
Who publishes Rey Mono?
Rey Mono is designed and published by Badan Studios, a board game studio from Madrid (Spain) founded by Alejandro Roldán and Aida Caba. It was released in November 2024 and is the studio's own original game, not a license or a third-party edition.
Where is Rey Mono made?
It's made in Spain with no plastic in its components, a decision the studio made to reduce the game's impact.
Can Rey Mono be used at school or for game-based learning?
Yes, it's used in classrooms and toy libraries as a game-based learning resource. It practices mental math with positive and negative numbers, sorting and matching, taking turns and decision-making, and since it doesn't rely on color alone, color-blind students can play too.
