Mad World
Extra Hands no longer earn money
Earn no Interest at end of round
Ranks 2 through 9 only, 32 cards total
Banned Blinds:
The Plant ( Boss The Plant.png)Mad World is a Challenge Deck. It bans most forms of earning money, but supplies an Eternal, Negative .png)
Pareidolia (All cards are considered {{hl|orange|face}} cards Uncommon Effect N/A (Passive) Pareidolia.png) and Eternal 
Business Card (Played {{hl|orange|face}} cards have a {{hl|green|1 in 2}} chance to give {{Money|2}} when scored Common Economy On Scored Business_Card.png) to assist with economy.
Starting Contents
The starting deck contains 32 cards in total, consisting of ranks 2 through 9 in each suit.
Synergies
Because remaining hands no longer earn money, scaling + Chips and + Mult Jokers are very strong as players can waste all hands to scale them without any penalty.
Reserved Parking (Each {{hl|orange|face}} card held in hand has a {{hl|green|1 in 2}} chance to give {{Money|1}} Common Economy On Held Reserved Parking.png) will provide additional income in addition to Business Card (Played {{hl|orange|face}} cards have a {{hl|green|1 in 2}} chance to give {{Money|2}} when scored Common Economy On Scored Business_Card.png).
Oops! All 6s (Doubles all [[listed probabilities|{{hl|orange|listed}} {{hl|green|probabilities}}]] <br> {{hl|grey|(ex: {{hl|green|1 in 3}} -> {{hl|green|2 in 3}})}} In one hand, earn at least {{hl|orange|10,000}} chips Uncommon Effect N/A (Passive) Oops!_All_6s.png), combined with the Eternal Business Card (Played {{hl|orange|face}} cards have a {{hl|green|1 in 2}} chance to give {{Money|2}} when scored Common Economy On Scored Business_Card.png) and 
Pareidolia (All cards are considered {{hl|orange|face}} cards Uncommon Effect N/A (Passive) Pareidolia.png), guarantees that every card earns $2 on scoring.
- Additionally, with the Reserved Parking (Each {{hl|orange|face}} card held in hand has a {{hl|green|1 in 2}} chance to give {{Money|1}} Common Economy On Held Reserved Parking.png) synergy stated above, this also guarantees every card held in hand to earn $1 after a hand is played.
Midas Mask (All played {{hl|orange|face}} cards become [[Gold Cards|{{hl|orange|Gold}}]] cards when scored Uncommon Effect On Played Midas_Mask.png) works well together with the Pareidolia (All cards are considered {{hl|orange|face}} cards Uncommon Effect N/A (Passive) Pareidolia.png), being able to give a consistent source of income.- Any Joker that benefits from Face Cards is useful for this challenge, be it
Scary Face (Played {{hl|orange|face}} cards give {{Chips|+30}} when scored Common Chips On Scored Scary Face.png), 
Smiley Face (Played {{hl|orange|face}} cards give {{mult|+5}} when scored Common Additive Mult On Scored Smiley Face.png), 
Sock and Buskin (Retrigger all played {{hl|orange|face}} cards Play a total of {{hl|orange|300}} face cards Uncommon Retrigger On Scored Sock and Buskin.png), etc.
- Jokers that rely on many number cards such as
Fibonacci (Each played {{hl|orange|Ace}}, {{hl|orange|2}}, {{hl|orange|3}}, {{hl|orange|5}}, or {{hl|orange|8}} gives {{Mult|+8}} when scored Uncommon Additive Mult On Scored Fibonacci.png), 
Even Steven (Played cards with [[Card Ranks|{{hl|orange|even}}]] rank give {{Mult|+4}} when scored <br> {{hl|gray|(10, 8, 6, 4, 2)}} Common Additive Mult On Scored Even Steven.png), and 
Odd Todd (Played cards with [[Card Ranks|{{hl|orange|odd}}]] rank give {{Chips|+31}} when scored <br> {{hl|gray|(A, 9, 7, 5, 3)}} Common Chips On Scored Odd Todd.png) are stronger on this deck, as those three Jokers affect half of the deck rather than only 20/52 cards in a normal deck.
Mail-In Rebate (Earn {{Money|5}} for each discarded [[Card Ranks|{{hl|orange|[rank]}}]], rank changes every round Common Economy On Discard Mail-In Rebate.png) picks a random rank in the deck every round, which is easier to find with only 8 ranks in this deck.
The Idol (Each played [[Card Ranks|{{hl|orange|[rank]}}]] of [[Card Suits|{{hl|orange|[suit]}}]] gives {{xmult|2}} when scored<br><small>Card changes every round</small> In one hand, earn at least {{hl|orange|1,000,000}} chips Uncommon Multiplicative Mult On Scored The Idol.png) has fewer options to choose from, making it more useful without editing the deck.
Canio (This Joker gains {{xmult|1}} when a {{hl|orange|face}} card is destroyed <br> {{currently|{{xmult|1}}}} Find this [[Jokers|Joker]] from the [[Spectral Cards|{{hl|sblue|Soul}}]] card. Legendary Multiplicative Mult Mixed Canio.png) gains X1 Mult when any card is destroyed. However, this can be dangerous due to the small deck.
Anti-Synergies
Jokers
Ride the Bus (This Joker gains {{Mult|+1}} per {{hl|orange|consecutive}} hand played without a scoring {{hl|orange|face}} card <br> {{Currently|{{Mult|+0}}}} Common Additive Mult Mixed Ride the Bus.png) and 
To the Moon (Earn an extra {{Money|1}} of {{hl|orange|interest}} for every {{Money|5}} you have at end of round Uncommon Economy N/A (Passive) To the Moon.png) are useless in this challenge.
Vagabond (Create a [[Tarot Cards|{{hl|purple|Tarot}}]] card if hand is played with {{Money|4}} or less Rare Effect Independent Vagabond.png) is hard to use due to Business Card providing lots of money during the blind.- Due to the small size of the deck,
Erosion ({{Mult|+4}} for each card below {{hl|orange|[the deck's starting size]}} in your full deck <br> {{Currently|{{Mult|+0}}}} Uncommon Additive Mult Independent Erosion.png) will have a lower ceiling on its maximum Mult.
- Similarly,
Blue Joker ({{Chips|+2}} for each remaining card in {{hl|orange|deck}} <br> {{currently|{{chips|+104}}}} Common Chips Independent Blue Joker.png) does not work well in this challenge due to the small size of the deck.
Scholar (Played {{hl|orange|Aces}} give {{chips|+20}} and {{mult|+4}} when scored Common Chips and Additive Mult On Scored Scholar.png) and 
Superposition (Create a [[Tarot Cards|{{hl|purple|Tarot}}]] card if poker hand contains an {{hl|orange|Ace}} and a {{ph|Straight}} <br> {{room}} Common Effect Independent Superposition.png) require Aces, which this deck does not start with.
Walkie Talkie (Each played {{hl|orange|10}} or {{hl|orange|4}} gives {{chips|+10}} and {{mult|+4}} when scored Common Chips and Additive Mult On Scored Walkie_Talkie.png) requires 10s and 4s, but this deck does not start with any 10s.
Baron (Each {{hl|orange|King}} held in hand gives {{xmult|1.5}} Rare Multiplicative Mult On Held Baron.png), 
Shoot the Moon (Each {{hl|orange|Queen}} held in hand gives {{mult|+13}} Play every Heart card in your deck in one round. Common Additive Mult On Held Shoot the Moon.png), 
Hit the Road (This Joker gains {{xmult|0.5}} for every {{hl|orange|Jack}} discarded this round<br> {{Currently|{{xmult|1}}}} Discard {{hl|orange|5 Jacks}} at the same time. Rare Multiplicative Mult Mixed Hit_the_Road.png) and 
Triboulet (Played Kings and Queens each give {{xmult|2}} when scored Find this [[Jokers|Joker]] from the [[Spectral Cards|{{hl|sblue|Soul}}]] card. Legendary Multiplicative Mult On Scored Triboulet.png) all rely on specific face cards, but this deck lacks them.
Vouchers
Seed Money (Raise the cap on interest earned in each round to {{Money|10}} Base Seed Money.png) and 
Money Tree (Raise the cap on interest earned in each round to {{Money|20}} Max out the interest per round earnings for ten consecutive rounds Upgraded Money Tree.png) are useless in this challenge.
Boss Blinds
The Mark ( Boss The Mark.png) is a particularly dangerous boss in this challenge, as it essentially means that all of your cards will be drawn face down.
Trivia
- The title is likely a reference to the Tears for Fears song Mad World, which begins with the line "All around me are familiar faces", here referring to face cards.
- This challenge deck in particular has only 32 cards, making it the smallest challenge deck.
In other languages
| Language | Name |
|---|
| Chinese (Simplified) | 疯狂世界 |
| Chinese (Traditional) | 瘋狂世界 |
| Dutch | Krankzinnige wereld |
| French | Monde de fous |
| German | Verrückte Welt |
| Indonesian | Dunia Gila |
| Italian | Mondo folle |
| Japanese | 狂気の世界 |
| Korean | 미친 세계 |
| Polish | Szalony świat |
| Portuguese (Brazilian) | Mundo Maluco |
| Russian | Безумный мир |
| Spanish (Spain) | Mundo loco |
| Spanish (Latin America) | Mundo loco |
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| Standard Decks |
 Red Deck ( {{hl|red|+1}} discard every round Unlocked from start Red Deck.png) Blue Deck ( {{hl|blue|+1}} hand every round Discover at least {{hl|orange|20}} items from your [[collection]] Blue Deck.png) Yellow Deck ( Start with extra {{Money|10}} Discover at least {{hl|orange|50}} items from your [[Collection|collection]] Yellow Deck.png) Green Deck ( At end of each Round: <br> {{Money|2}} per remaining {{hl|blue|Hand}} <br> {{Money|1}} per remaining {{hl|red|Discard}} <br> Earn no {{hl|orange|Interest}} Discover at least {{hl|orange|75}} items from your [[collection]] Green Deck.png) Black Deck ( {{hl|orange|+1}} Joker slot <br> {{hl|blue|-1}} hand every round Discover at least {{hl|orange|100}} items from your [[collection]] Black Deck.png) Magic Deck ( Start run with the {{V|Crystal Ball|class=hl-purple}} voucher and {{hl|orange|2}} copies of {{tarot|The Fool}} Win a run with the {{D|Red}} on [[Stakes|any difficulty]] Magic Deck.png) Nebula Deck ( Start run with the {{V|Telescope|class=hl-cyan}} voucher <br> {{hl|red|-1}} consumable slot Win a run with the {{D|Blue}} on [[Stakes|any difficulty]] Nebula Deck.png) Ghost Deck ( [[Spectral Cards|{{hl|sblue|Spectral}}]] cards may appear in the shop, start with a {{spectral|Hex}} card Win a run with the {{D|Yellow}} on [[Stakes|any difficulty]] Ghost Deck.png) Abandoned Deck ( Start run with no {{F|}}[[Card Ranks#Face cards|{{hl|orange|Face Cards}}]] in your deck Win a run with the {{D|Green}} on [[Stakes|any difficulty]] Abandoned Deck.png) Checkered Deck ( Start run with {{hl|orange|26}} {{suit|Spades}} and {{hl|orange|26}} {{suit|Hearts}} in deck Win a run with the {{D|Black}} on any difficulty Checkered Deck.png) Zodiac Deck ( Start run with {{V|Tarot Merchant|class=hl-purple}}, {{V|Planet Merchant|class=hl-cyan}}, and {{V|Overstock|class=hl-orange}} Win a run with any [[Decks|deck]] on the {{Stake|Red}} difficulty or harder Zodiac Deck.png) Painted Deck ( {{hl|orange|+2}} hand size, <br> {{hl|red|-1}} Joker slot Win a run with any [[Decks|deck]] on the {{Stake|Green}} difficulty or harder Painted Deck.png) Anaglyph Deck ( After defeating each [[Blinds|{{hl|orange|Boss Blind}}]], gain a [[File:Double tag.png|24px]] [[Tags|{{hl|orange|Double Tag}}]] Win a run with any [[Decks|deck]] on the {{Stake|Black}} difficulty or harder Anaglyph Deck.png) Plasma Deck ( Balance [[Chips|{{hl|blue|Chips}}]] and [[Mult|{{hl|red|Mult}}]] when calculating score for played hand <br> {{hl|red|X2}} base Blind size Win a run with any [[Decks|deck]] on the {{Stake|Blue}} difficulty or harder Plasma Deck.png) Erratic Deck ( All [[Card Ranks|{{hl|orange|Ranks}}]] and [[Suits|{{hl|orange|Suits}}]] in deck are randomized Win a run with any [[Decks|deck]] on the {{Stake|Orange}} difficulty or harder Erratic Deck.png)
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| Challenge Decks |
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