Planet Moolah slot

Who made the Planet Moolah slot machine

Planet Moolah comes from WMS, the American company that grew out of Williams, the pinball and arcade maker. WMS made its first slots in 1994 and had its first casino hit with Reel 'Em In in 1996, a game the WMS Industries history (opens in a new tab) credits as the first American video slot with a second-screen bonus. WMS was bought by Scientific Games in October 2013, and Scientific Games renamed itself Light & Wonder in 2022.

That background matters because Planet Moolah is a casino-floor design brought online. It is a 25-line video slot built around WMS's cascading reels mechanic, with a comic sci-fi theme in which aliens come to abduct cows. Its release year is not confirmed in the sources we use, so we leave it out.

How Planet Moolah's cascading reels work

In most five-reel games a spin is one result. In Planet Moolah a spin can be several results in a row. This is the cascading reels mechanic, sometimes called tumbling or avalanche reels.

1. Set your stake and press spin. The RNG decides the full sequence, including every cascade that will follow.
2. The game checks all 25 lines for wins.
3. Symbols that form a win are paid, then removed from the reels.
4. Symbols above drop down into the gaps and new symbols fall in from the top.
5. The lines are checked again; any new win pays and cascades again.
6. The sequence stops when a cascade produces no new win, and the total is added to your balance.

The key point is that cascades are not extra luck you earn by watching. The whole chain is part of one random result fixed before the reels move, which is how all online slot software works.

A worked cascade (illustrative values)

On a 50p spin (2p a line), suppose the first result pays 10× the line bet on one line, 20p. Those symbols explode, new ones fall and form a 25× win, 50p. A third cascade pays nothing. The spin returns 70p in total for 50p staked. Then a spin that pays 20p and stops costs you 30p, even though the screen showed a win. UK rules stop games celebrating returns like that as if they were wins.

Planet Moolah symbols and paytable structure

The reels mix cow and alien characters with lower-paying symbols. The paytable in the game lists what each pays for three, four or five on a line at your stake, which wild substitutes for what, and which symbol triggers the bonus. Because WMS supplied the game in several markets and settings, we do not reprint values that could differ from your version.

Planet Moolah free spins bonus

Planet Moolah has a free spins bonus triggered by bonus symbols, and cascading reels keep working during the round, so each free spin can also chain several wins. The help screen states how many bonus symbols are needed, how many spins are awarded and whether more can be won during the round. Reference sources disagree on details, so check those figures in the version you play rather than relying on a review.

Cascades help bonus symbols too: a symbol that falls in during a cascade counts just as one that landed on the first drop. That makes the round feel more reachable, but the trigger chance is already built into the game's RTP and does not rise because you have played a long time.

Planet Moolah RTP: 96% or 95%?

The Planet Moolah RTP is listed at 96%, with some sources giving 95%. One point sounds small, but it changes the average cost by a quarter: £4 per £100 staked at 96%, £5 at 95%.

Both figures are a little below many modern online slots at 96.5% or more. Our page on what a good RTP is for a slot puts that in context, and how to find a slot's RTP shows where the figure sits in the rules.

Planet Moolah volatility and max win

Planet Moolah is rated medium volatility. Cascades produce frequent small returns, and the bonus round adds the occasional larger one. That suits budgets of roughly 100 to 200 spins.

No verified Planet Moolah max win figure is available, so we do not state one. Stake size is the firmer number: the online slot stake limits cap a spin at £5 from age 25 and at £2 between 18 and 24.

Cascade animations slow real play, but a budget can still go faster than people expect. Our guide to how long your money will last on slots works through more examples.

Planet Moolah in casinos and online

WMS built its business on casino cabinets, and Planet Moolah's style reflects that. In Great Britain, land-based machines are grouped into gaming machine categories with their own stake and prize limits: Category B1 machines in casinos allow up to £5 a stake and a £10,000 prize (£20,000 when linked). Whether a particular cabinet title is on a UK floor depends on the venue, so we do not claim it is. Online versions are not in those categories; they follow the online stake limits instead.

Before machines are released, test houses approved by the Gambling Commission check their randomness and payout behaviour. The Commission publishes its list of approved test houses (opens in a new tab), and our page on how machines are tested explains the process.

UK online rules for Planet Moolah

• No autoplay since 31 October 2021; every spin is started by hand.
• At least 2.5 seconds per spin and no turbo; see the spin speed rule.
• Cascade totals that don't beat your stake are shown without win effects.
• Net position and session time on screen.
• The bonus is earned, never bought: GB versions carry no purchase option.
• Maximum stake £5 per spin (25+), £2 (18–24).

Planet Moolah demo

A Planet Moolah demo lets you watch the cascades and learn the bonus trigger before staking money. Expect an age check first at a British-licensed site; the demo's credits are for practice and never become cash, and a few minutes of play reveals nothing about long-run returns. See are free slot games the same as real ones.

Slots like Planet Moolah

Cascades have become common. For another studio's take, Gonzo's Quest uses avalanche reels with rising multipliers, and Reactoonz 2 applies cascades to a cluster grid. For another Light & Wonder title, 88 Fortunes comes from the Bally side of the group, and Rainbow Riches from Barcrest.

Planet Moolah myths and facts

• ‘A long cascade means the bonus is next.’ Each spin is independent of the last.
• ‘Casino-style games are tighter online.’ The RTP is set per version and shown in the rules; check it rather than guess.
• ‘The machine is due after a dry spell.’ No: see loose and tight slot machines.
• ‘Watching the cascades closely helps.’ The chain was decided when you pressed spin.

Is the Planet Moolah slot worth playing?

Where to play Planet Moolah in the UK

Light & Wonder games appear at many UK-licensed casinos, but the line-up varies, so search the lobby for Planet Moolah before you register and check its RTP. Partner offers here cover slots broadly. Coral's welcome is 100 spins, 10p apiece on nominated games, for a £10 slot bet; Ladbrokes releases 50 spins daily for 10 days (500 in total, 10p each) after you play £10 on slots; PlayOJO's 80 spins come with a £10-plus first deposit and run on Big Bass Bonanza. Available to new players aged 18+; terms apply.

Set a limit before you play. Worried about how much you play? The National Gambling Helpline, operated by GamCare (opens in a new tab), answers free around the clock on 0808 8020 133.

18+. Gambling should be entertainment that costs money, not a way to make it. Decide a budget before you play: plan a slot budget. Free, confidential help: National Gambling Helpline 0808 8020 133.