Roulette is a casino game built around a spinning wheel, a numbered ball, and wagers placed on where the ball will land.
Most Sin City casinos use American roulette, with numbers 1–36 plus 0 and 00. Higher-end or private tables may use European roulette, which has only a single 0 and gives the house a smaller advantage.
Before play begins, Franz should establish:
Minimum and maximum bet
American or European wheel
Table limits
Whether special side bets are allowed
Whether the game is legal, private, or underground
Roulette is primarily a game of chance. Skill affects wager selection, bankroll control, cheating, and reading table conditions, but not the actual spin under normal play.
Players place chips on the betting layout before the dealer closes betting.
Common wagers include:
Straight Up: One exact number
Split: Two adjacent numbers
Street: Three numbers in one row
Corner: Four numbers meeting at one corner
Six Line: Two neighboring rows
Column: One vertical column of twelve numbers
Dozen: 1–12, 13–24, or 25–36
Red or Black
Odd or Even
Low or High: 1–18 or 19–36
The 0 and 00 are neither red nor black, odd nor even, and do not belong to low, high, dozen, or column wagers.
Once betting closes, no legal wager may be added, removed, or changed.
Use a physical roulette wheel, digital randomizer, or the following roll.
For American roulette, roll 1d38:
Results 1–36 correspond to the numbered spaces.
Result 37 is 0.
Result 38 is 00.
For European roulette, roll 1d37:
Results 1–36 correspond to the numbered spaces.
Result 37 is 0.
Franz should announce the winning number and whether it is red, black, odd, even, low, or high.
Standard roulette colors are:
Red: 1, 3, 5, 7, 9, 12, 14, 16, 18, 19, 21, 23, 25, 27, 30, 32, 34, 36
Black: 2, 4, 6, 8, 10, 11, 13, 15, 17, 20, 22, 24, 26, 28, 29, 31, 33, 35
Zero and double zero are green.
Payouts are listed as profit in addition to the returned original wager:
BetNumbers CoveredPayoutStraight Up135-to-1Split217-to-1Street311-to-1Corner48-to-1Six Line65-to-1Column122-to-1Dozen122-to-1Red or Black181-to-1Odd or Even181-to-1Low or High181-to-1
A winning straight-up bet of 10 GP therefore returns the original 10 GP plus 350 GP in winnings.
American roulette favors the house because 0 and 00 cause most outside bets to lose.
European roulette has only one zero and therefore provides better odds to players.
A character may recognize this with a DC 10 Intelligence check. No check is required for a trained or experienced gambler.
Roulette should not be resolved through a gambling skill check that replaces the wheel result.
Intelligence may help a character understand odds, avoid poor side bets, manage a bankroll, or recognize an unfavorable table. It cannot predict a fair spin.
Players may use strategies such as:
Flat betting
Increasing wagers after losses
Reducing wagers after wins
Spreading bets across sections
Combining inside and outside bets
Following recently frequent numbers
These strategies change risk and volatility but do not remove the house advantage.
Past results do not make an independent number “due.”
A successful DC 12 Intelligence check may warn a character that a betting pattern does not actually improve the underlying odds.
Roulette tables may use uniquely colored chips so wagers can be traced to individual players.
The dealer may assign a value to each player’s chip color. These chips usually must be exchanged before leaving the table.
Players should state:
Amount wagered
Exact bet type
Number or section selected
A vague statement such as “I bet near 20” is not a valid wager unless the table offers a defined call bet.
High-end tables may allow announced wagers placed by the dealer on the player’s behalf.
Private or European-style tables may also offer sector bets covering groups of nearby wheel numbers.
These should only be used when Franz clearly explains which numbers are covered, total cost, and payout.
Underground tables may offer unusual side bets with worse odds or hidden conditions.
Possible cheating methods include:
Adding chips after the ball lands
Removing losing chips before collection
Dealer collusion
Stealing another player’s winning chips
Counterfeit chips
Wheel tampering
Ball manipulation
Hidden magnets or devices
Distracting the dealer
Predicting a defective wheel through repeated observation
Most roulette cheating requires preparation, access, Sleight of Hand, technical skill, deception, or an insider.
Past-posting—placing or moving a wager after the result becomes apparent—is one of the most common forms of cheating.
Resolve it using Dexterity (Sleight of Hand) opposed by dealer or security Wisdom (Perception).
A successful check deceives nearby observers but may still be exposed through camera review.
A damaged or poorly maintained wheel may favor certain sections over many spins.
Identifying a genuine bias requires:
Observation over many spins
Accurate record keeping
Intelligence
Time
Access to the same wheel
A character studying a wheel may make an Intelligence check, usually DC 18, after observing a substantial number of spins.
Success may reveal that one section appears unusually frequent. It should provide a limited advantage or useful information, not certainty.
Modern casino maintenance and surveillance make reliable wheel bias uncommon.
Roulette players may attract attention by:
Repeatedly past-posting
Touching chips after betting closes
Winning through an apparent wheel bias
Coordinating distractions
Using counterfeit chips
Spending long periods recording results
Communicating with an employee
Making unusually large wagers
Casino staff may change the dealer, close the table, inspect the wheel, review footage, restrict wagers, question the player, or issue a ban.
Large legitimate wins may also attract hosts, tax records, and financial review.
For short scenes, Franz may resolve several spins at once.
The player chooses a general risk level:
Conservative: Mostly even-money bets
Moderate: Dozens, columns, and small combinations
Aggressive: Straight numbers and narrow inside bets
Then roll one flat d20 luck check with no ability modifier:
1–5: Lose most or all of the session stake
6–10: Moderate loss
11–14: Roughly break even
15–18: Moderate profit
19–20: Major profit
Aggressive play increases both the potential loss and profit. Conservative play narrows both.
Quick play should not replace actual spins when the roulette game is the scene’s main focus.
Franz should clearly state the wheel type, wager, payout, and betting deadline.
Players choose their own numbers, sections, and stake sizes. Franz should not recommend a supposedly guaranteed winning pattern.
Roulette works well for tense conversations, sudden large wins, casino surveillance, chip theft, debt escalation, cheating investigations, and meetings where characters remain gathered around the same table.