How to choose an online slot on real numbers
Thousands of online slots compete for attention, and most lists rank them by popularity or by what a casino pays to promote. WildmarkSlots ranks 3,708 slots from 15 studios on the numbers the studios publish: return to player, volatility and maximum win. Every game has its own page with every recorded RTP version, what each version costs per $1,000 wagered, and a link to the studio's official game page.
RTP: the cost of playing
Return to player is the share of all money wagered that a slot pays back over a very long run. The median headline RTP across the catalogue is 96.14%. At 96%, every $1,000 wagered loses $40 on average; at 94%, it loses $60. A single session can end far from the average, but over many sessions a higher RTP costs less. Read more in What is RTP.
RTP versions: the number most lists leave out
Many studios certify a game at several RTP settings and the casino chooses one. For the 737 slots with several recorded versions, the lowest version is on average 8.4 points below the headline figure. The game looks the same in every version, so check the RTP in the game's help screen and compare it with the versions listed on its WildmarkSlots page.
Volatility and max win: how a session feels
Volatility describes how unevenly a slot pays its RTP. Low volatility games pay small wins often; high and very high volatility games go quiet for long stretches and pay most of their return in rare big wins. A high max win, such as 10,000× the bet or more, usually comes with high volatility. Browse low volatility slots or big max win slots to match a game to your budget.
Features: bonus buy, Megaways and cascades
Features change how a game pays, not how much it returns overall. Bonus buys let you pay a fixed price to start free spins; Megaways reels change the number of ways to win on every spin; cascading reels can turn one spin into a chain of wins. Each slot page lists the features recorded from the studio's rules.
Play within limits
Every slot costs money over time, whatever its RTP. Set a money and time limit before you play, and use the session budget calculator to see how long a budget lasts. If gambling stops being fun, free, confidential help is available.