What all versions share
A European wheel has 37 pockets, 1 to 36 and a single zero. Inside bets cover single numbers or small groups; outside bets cover red or black, odd or even, high or low, dozens and columns. On a standard table a straight-up bet pays 35:1 and an even-money bet 1:1, which gives a 2.70% house edge.
Online games have a betting window, usually 10 to 15 seconds on live tables, followed by the spin. RNG versions let you spin at your own pace, which also means faster losses.
Multiplier roulette
In Lightning Roulette, from Evolution, one to five numbers are struck before the ball lands, each with a multiplier from 50x to 500x. A straight-up bet on a struck number pays the multiplier; on any other number it pays 29:1. Outside bets pay as normal.
Other studios run similar games under their own names. The idea is the same: lower base payouts on single numbers fund rare large ones. Your stake runs out at about the same rate; the results just swing more.
Other variants
- French roulette: the la partage rule returns half of an even-money bet when zero lands, cutting the edge on those bets to 1.35%.
- American roulette: adds a double zero, raising the edge to 5.26%; avoid it when a European wheel is available.
- Double-ball games: two balls per spin, with their own paytable for bets that need both balls.
- Speed and auto roulette: standard rules, shorter rounds, more spins per hour.
Stakes and bankroll
Fix the stake per spin as a share of your session budget, 1% to 2% for even-money bets. Keep side bets and multiplier straight-ups to a small part of each spin. No betting system changes the edge; doubling after losses only raises the size of the losing streak you can afford.