MGM Grand Millions Slot Review: The BetMGM Exclusive Jackpot Game

The single most important fact about MGM Grand Millions belongs at the very top, because it shapes everything else. This game is a BetMGM Casino exclusive. It was developed in house by Ivy, the proprietary games studio inside Entain, the company that operates BetMGM alongside MGM Resorts, and it is not licensed out to any rival operator. You will not find it at DraftKings, FanDuel, Caesars or any other app. The only places it appears are BetMGM Casino and its sister brand Borgata, which run on the same Entain platform and share the same jackpot pool. That single operator ceiling is the trade off for the seven figure prize: the jackpot is fed by every player across BetMGM and Borgata, so it grows fast, but you have to be inside one of those two apps, in a state where they are licensed, to chase it.

A quick clarification also belongs up here, because the name gets tangled with several other products. MGM Grand Millions is not a Megaways slot, even though some third party sites list it as “MGM Grand Millions Megaways.” It uses a fixed 243 ways to win engine that expands to 1,024 ways only during the free spins, which is a different mechanic from the shifting reel heights of a true Megaways game. It is also a separate title from MGM Grand Gamble and MGM Grand Emerald Nights, which are Push Gaming slots with their own math, and from the broader four tier “MGM Millions” jackpot network that Entain runs in some overseas markets. Everything on this page refers to the five tier MGM Grand Millions slot live in the regulated United States market at BetMGM.

Quick-View Table: MGM Grand Millions

These headline numbers describe MGM Grand Millions as it runs in the legal BetMGM lobby. The return to player figure is quoted two ways because the jackpot contribution changes the picture, and any figure the studio does not publish is marked so rather than guessed.

Version Comparison Table

MGM Grand Millions is a single title rather than a family of sequels, so there are no spin off versions with different reels or bonuses to compare. What does vary is the build you load depending on the market you are in, since Entain runs the same game across its regulated United States and Canadian platforms. The table below maps those builds and confirms there is no Megaways edition and no land based cabinet. There is no separately published re release with altered math; the jackpot pool and the core mechanics are shared across every regulated BetMGM and Borgata lobby.

If a casino floor or a lobby points you to something called MGM Grand Millions on a physical machine, it is not this game; the slot reviewed here was built as an online title for the BetMGM platform and has never shipped as a cabinet. Likewise, the MGM Grand Gamble and MGM Grand Emerald Nights slots you may see are Push Gaming products, not builds of this one.

Game Overview and How MGM Grand Millions Plays

MGM Grand Millions sets you on the floor of the MGM Grand in Las Vegas. The reels are wrapped in the property’s emerald and gold color scheme, the golden lion statue that stands at the entrance appears as the wild, and the soundtrack leans on the chimes and ambient noise of a live casino floor to sell the setting. The grid is a five reel All Ways layout, which drops fixed paylines entirely. Instead of betting on lines, you activate every position, and any matching symbols landing on adjacent reels from the leftmost reel rightward form a win. In the base game that produces 243 ways to win, and once you reach the free spins the ways count expands to 1,024. This is a progressive slot at heart, dressed in a Vegas style theme, and the whole design points toward the jackpot rather than the base reels.

Betting works through a bet value control. You raise or lower the bet value with the plus and minus buttons, and the total stake is always 20 times that value, so the minimum spin is 0.20 and the maximum runs to 500. That is a wide range, and it matters more than usual here because the jackpot chance scales with the size of your bet: the more you stake, the larger your contribution to the pool and the better your odds of the random jackpot wheel firing. The game also carries the full set of BetMGM automation controls, including standard autospin, a spin till win option that keeps spinning until a target win is reached, and a spin till feature option that runs until the next bonus triggers.

Here is the part every player needs to understand before depositing. The base game return to player is 91.81 percent, which is low for a modern video slot and well under the 96 percent many players expect. That number is deliberately held down because roughly 3 percent of every wager is diverted into the progressive jackpot pool, which lifts the effective return to somewhere around 95 percent once the jackpots are counted, but only if you are the kind of player who values the jackpot chance over steady base game return. In plain terms, MGM Grand Millions pays back less on the reels than a typical slot, and it asks you to accept that in exchange for a shot at a seven figure prize that no ordinary slot offers. If you care mainly about grinding a low variance session, this is not the game for you; if you are here for the jackpot, the math makes sense. Our RTP guide explains how to read that split, and the volatility primer covers why the swings feel steep on a high variance jackpot title like this one.

Symbols and What They Pay

The symbol set is themed entirely around the MGM Grand property and classic Las Vegas iconography. From the top of the pay table down, the reels carry the following.

• Golden MGM lion statue (wild): The property’s landmark lion is the wild. It substitutes for every symbol except the scatter to help complete an All Ways win, and in the base game it lands only on reels 1, 2, 3 and 4, never on reel 5. Because it stands in for premiums, a well placed wild can turn a near miss into a full width win across all five reels.
• MGM Grand logo (scatter): The MGM Grand logo is the scatter and the trigger for the free spins. It pays nothing as a line symbol; its only job is to open the bonus when enough of them land.
• Premium Vegas symbols: High value icons drawn from the MGM Grand and the Las Vegas theme, including luxury and casino imagery, sit at the top of the standard pay table and drive the largest ordinary wins.
• Card value symbols: The familiar ace, king, queen, jack and ten style royals fill out the low end as the filler symbols that pay small amounts for three, four or five across the ways.

Because the game does not publish a fixed credit value for every symbol at each bet level, the exact per symbol pays are best read from the in game pay table at your chosen stake, where the values scale with the total bet. The important structural points are the two that shape the whole game: the lion wild is restricted to reels 1 through 4 in the base game, and the MGM Grand logo scatter carries no pay of its own.

Bonus Symbol Cross-Check

Because MGM Grand Millions is a single title with no sequels, there is only one set of bonus symbols to track, and it does not change between builds. Every regulated version of the game, whether you load it in a United States BetMGM lobby, in Borgata, or in the Canadian BetMGM app, uses the identical MGM Grand logo scatter to trigger the free spins and the identical golden lion wild. There is no version of this game with a different scatter or a different wild, so a player who learns the symbols in one lobby knows them in all of them. The one thing that is not a symbol at all is the jackpot trigger: the five tier jackpot wheel is not launched by landing any particular icon, but fires at random, which is covered in its own section below. So the answer to the usual cross check question is a clean one: one game, one scatter, one wild, and a jackpot that no symbol controls.

How to Trigger the Bonus

MGM Grand Millions has two distinct bonus events, and they are triggered in completely different ways, so it is worth separating them clearly.

The free spins are triggered by the scatter. Land three or more MGM Grand logo scatters anywhere in view on a single spin and you open the free spins feature. The scatters can land on any reel, so there is no reel restriction on the trigger the way there is on the wild. This is the only route into the free spins; there is no bonus buy on any build, so you cannot pay to skip straight to the feature, and the scatters have to arrive naturally.

The jackpot is triggered by nothing you can aim for. The five tier progressive jackpot wheel launches at random. It can appear after any paid base game spin, during autoplay, and even after a feature round resolves, and it is not tied to a symbol combination or to reaching the free spins. Because the trigger is random and weighted by your stake, a larger bet improves the chance of the wheel appearing, which is the game’s honest answer to why the base return is set low. You do not need to do anything to “start” the jackpot beyond spinning for real money; the software decides when the wheel drops in. If you are new to how random triggers and certified fairness work, our RNG guide walks through it.

How the Bonus Works

The two bonuses play very differently once they hit, so here is exactly what happens on screen for each.

The free spins feature is a pick round followed by multiplied spins. When the scatters trigger it, you are shown a stack of slabs or steps and asked to select your way upward. Each pick you reveal awards a number of free spins and a multiplier value, and you keep climbing and accumulating until you reveal a stop, at which point the total you have banked is locked in and the spins begin. Across the game’s published range, the feature awards between 6 and 30 free spins with a multiplier somewhere from 2 up to 8 times, so a strong run of picks can hand you a deep pool of spins running at a high multiplier. During the free spins the ways to win expand from 243 to 1,024, which sharply increases how often symbols connect, and every win in the round is multiplied by the value you banked in the pick phase. One important limit: the free spins cannot be retriggered, so whatever you accumulate in the opening pick is what you play out, and landing more scatters during the round does not add spins.

The jackpot wheel is the marquee event and it is pure chance once it appears. When the wheel drops in at random, it fills the screen with five colored segments, each mapped to one of the five progressive tiers. The wheel spins, decelerates and stops on a color, and the tier that color represents is paid out to you instantly, resetting that tier to its seed value for the next player. There is no skill and no pick involved; the random number generator decides where the wheel lands. The five tiers, from smallest to largest, are Blitz Cash, which seeds at 40, Quick Cash at 200, Super Cash at 750, Mega Cash at 10,000, and Colossal Cash, which seeds at 1,000,000 and grows from there. Because the smaller tiers land far more often than the top one, MGM Grand Millions is known less for a single huge hit and more for how frequently it drops one of the lower jackpots, which is a large part of why it has stayed a BetMGM headliner. The Colossal Cash tier is the one that makes news: BetMGM has publicized wins on this game running past 4,500,000, and the top prize is marketed as reaching into the multiple millions.

Version by Version

MGM Grand Millions is one title, so this section documents the single game as it exists across the platforms that carry it, rather than a list of sequels. The important distinctions are which builds are genuinely live, and which commonly cited “versions” are actually different games or plain mislabels.

MGM Grand Millions, BetMGM United States build (2022)

This is the game the review is about and the one live in the regulated United States market. Ivy, Entain’s in house studio, built and released it in September 2022 as a BetMGM Casino exclusive, and it quickly became one of the operator’s most played and most promoted slots. It runs five reels with 243 All Ways in the base game, expands to 1,024 ways in the free spins, and carries the full five tier progressive jackpot wheel shared across the BetMGM and Borgata pool. The base return to player is 91.81 percent, lifted to roughly 95 percent once the jackpot contribution is counted, and the volatility is high, with the largest outcomes concentrated in the random jackpot rather than the reels. The bet range runs from 0.20 to 500 per spin, with the jackpot chance scaling to the stake. This build is available in every state where BetMGM Casino is licensed, and it is the reference point for every specification on this page.

MGM Grand Millions, Borgata build (2022)

Borgata Casino runs on the same Entain platform as BetMGM and shares the identical MGM Grand Millions game and the same progressive jackpot pool, so a spin placed in the Borgata app contributes to and can win the same jackpots as a spin in BetMGM. In practice this is not a separate version so much as the same title served through a sister brand: the reels, the 243 ways, the free spins pick, the lion wild, the MGM Grand logo scatter and the five jackpot tiers are all the same. It matters only because it slightly widens where you can legally reach the game. If your state has Borgata but you think of it as a BetMGM only title, it is worth knowing the two apps carry the identical slot and the identical prize pool.

MGM Grand Millions, Canadian BetMGM build (2022)

Entain also runs MGM Grand Millions through BetMGM in Ontario and the wider Canadian market. It is the same game with the same mechanics, offered under the local regulatory framework, and it exists here to note that the title is not exclusive to the United States, only to the BetMGM ecosystem. For a United States player this build is not reachable, since you must be physically inside a licensed jurisdiction to play, but it is included so the version picture is complete and honest rather than implying the game only exists in one country.

The “Megaways” mislabel and the Push Gaming lookalikes

This entry exists to correct rather than to add specifications. Several third party review pages list this slot as “MGM Grand Millions Megaways.” That label is wrong. MGM Grand Millions uses a fixed 243 ways to win engine that expands to a fixed 1,024 ways in the free spins; it does not use the variable reel height Megaways mechanic licensed from Big Time Gaming, and there is no Megaways build of this game. Separately, BetMGM’s library also includes MGM Grand Gamble and MGM Grand Emerald Nights, which are slots built by Push Gaming with entirely different reels, returns and features. They share the MGM Grand branding but they are not versions of this jackpot game, and their specifications do not apply here. Treat any “Megaways” version as nonexistent, and treat the Push Gaming MGM Grand titles as separate reviews.

Max Win and the Jackpot in Context

On MGM Grand Millions the maximum win is the jackpot, not a reel multiplier, which is unusual and worth stating plainly. The five progressive tiers seed at 40, 200, 750, 10,000 and 1,000,000, and the top Colossal Cash tier grows from its million dollar seed until someone wins it. That is where the game’s headline outcomes live: publicized hits on this title have run above 4,500,000, and one widely reported win landed a seven figure jackpot from a stake of just 40 cents, which underlines that the jackpot is random and stake weighted rather than reserved for maximum bettors. The studio does not publish a fixed base game or free spins line max win multiplier, so those cells are marked “Not published” rather than filled with a guess; the practical ceiling for any given spin is whichever jackpot the wheel happens to award.

The context that matters is the trade off. A base return of 91.81 percent is genuinely low, and on a high volatility game that means long stretches without meaningful base game wins are normal. What you are buying with that lower return is the jackpot exposure, and specifically the unusually high frequency with which MGM Grand Millions drops one of its smaller tiers. It is not a game to play if you want your bankroll to last on steady base pays; it is a game to play if the appeal of a random, potentially enormous jackpot outweighs a below average reel return. Read the posted return to player in the game information panel before you deposit, because that single number, not the MGM branding, tells you what you are actually playing.

MGM Grand Millions on Mobile

MGM Grand Millions was built for the BetMGM and Borgata apps and their mobile browsers, and it runs the same on a phone as on desktop. The five reel grid, the pick style free spins slabs and the full screen jackpot wheel all scale to a portrait phone screen, and the automation controls, including spin till win and spin till feature, are present in the mobile build. Because the jackpot can trigger at random on any paid spin, a stable connection matters; the operator’s game state recovery handles a dropped session, but playing on wifi where you can is still the safer choice for a title whose biggest moment can arrive at any second. Our mobile slots hub covers device compatibility and the BetMGM and Borgata apps that carry the game.

Where to Play MGM Grand Millions

The where to play answer for this game is simple and it is BetMGM centric because the game itself is. MGM Grand Millions lives inside BetMGM Casino, with Borgata offering the same title on the same platform, and it is not available offshore or at any other licensed operator. To find whether BetMGM or Borgata is live in your state, along with the sign up offers attached to each, start at the legal casino sites directory and filter to your jurisdiction. If you want to play MGM Grand Millions for real money, a BetMGM or Borgata account in a licensed state is the only route, and the shared jackpot pool means it makes no difference to your jackpot odds which of the two brands you spin in.

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