Invaders from the Planet Moolah is an eccentric space-themed online slot machine from Scientific Games played on a classic 5x3 reel set with 25 fixed paylines. The game features the cascading reels mechanic, three different wild symbols, and a thrilling free spins game offering wins of up to $250,000.

There’s no questioning that Invaders from the Planet Moolah is a fun and entertaining online slot machine. The game features a farmyard-meets-space storyline, filled with animal characters and other farm-themed symbols. The graphics are amusing, and the space sounds provide an immersive experience that makes you feel like you're having a close encounter of the third kind!
The medium-low volatility makes it a great game for beginners, and high-value prizes ensure it’s equally appealing to experienced players. I definitely would have rated it higher if there were more bonus features, but there’s still a lot to get excited about.
If you enjoy cartoon-style graphics and engaging storylines, this farmyard space adventure ticks those boxes. It’s a creative environment to spin slots on a classic 5x3 reel set. The low-to-medium variance means you should get a decent length of gameplay from a relatively low budget.
Scientific Games lives up to its name with this inspiring game: equal parts futuristic space tech and quirky humor. The gameplay is nothing out of this world, with a free spins bonus triggered through hitting consecutive cascades in the base game. There are also three different wild symbols to help you hit winning combos, but they all behave the same way.
Although there is only one bonus game, it’s an exciting one, with plenty of chances for retriggers from within the round. It can also, at random, award up to 7 additional spins if it doesn’t feel like you’ve had enough. Always a welcome feature in a slot!
Pros ✅
Up to 50 free spins per game round
High $250,000 max win
Med-low variance good for beginners
Engaging theme and artwork
Cons ❌
Gameplay can be slow—no turbo option
Single feature slot
Misleading jackpot symbols
All the game controls in Invaders from the Planet Moolah are confined to the control panel, which sits directly below the reels.
Where you see the BET/LINE display, you can use the plus and minus buttons to change your bet size. Your total bet per spin is displayed in the adjacent window, the BET/LINE value multiplied by the 25 paylines. Then hit the blue spin button to start your game.
The objective of the game is to land matching symbols on consecutive reels from left to right along one of the fixed paylines to trigger payouts. Each time you hit a winning spin, the cascading reels mechanic will kick in, removing winning symbols from the reels for a chance to hit another payout.
There is an unusual selection of farm buildings, equipment, animals, and characters on the reels. The characters pay out in any mixed combination, which is a unique feature of the game.
There is no scatter symbol, but the game does have three wild symbols, represented by different-colored cows: one black and white, one with brown and white, and one brown.
There is also a jackpot symbol, which is the top-payer in the game, offering 30x for matching five of a kind. It is slightly misleading, as it resembles a bonus symbol, but it only offers payline wins.
The wild cows and cascades engine are active on all base game spins, plus there’s a single free spins bonus, which is triggered by consecutive cascades.
The three wild symbols can appear on reels 2-5 and substitute for regular pay symbols to help you create winning combos.
Cascades occur following any winning spin in the base game. Once you get paid out, all symbols involved in the win are zapped by the UFOs above their reel and vanish from the grid, creating a cascade of new symbols from above.
If another winning combo lands following the cascade, the UFOs kick into action again, and the cascades repeat. This will continue until no further winning combinations are formed.
The number of cascades in a sequence is marked on the meter to the side of the reels. Once you hit four, the free spins bonus is triggered.
You need four or more consecutive cascades on a single spin to trigger the free spins as follows:
During the bonus, four or more consecutive cascades will add additional free spins, plus, sometimes, randomly, seven additional free spins will be awarded at the end of your spins.
You can play Invaders from the Planet Moolah on smartphones and tablets, and we tested it on both Apple and Android devices. You do have to play in landscape mode, but we find that more comfortable for slots.
The game performed just as well on casino apps and through the mobile browser.
Invaders from the Planet Moolah certainly isn’t a sophisticated game. It’s designed to be fun and engaging, with amusing graphics and fun sound effects. The animations can take a little while to play out, particularly between cascades, but otherwise, it offers plenty to keep you entertained.
We’d love to see more bonus features, but the chance of starting your free spins round with up to 50 free spins more than makes up for it.
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As passionate casino game fans, we’re committed to giving our readers honest and unbiased opinions. We compare each game against the same set of criteria to ensure balance across our reviews, focusing on these key areas:
If you are unfamiliar, RTP stands for return to player, expressed as a percentage of each wager, and the volatility of a game indicates the risk-reward balance. Combining these helps to paint a picture of the type of gameplay you can expect.
We value engagement, innovation in gameplay, and stability across devices. When conducting our reviews, we will compare these factors across various devices and platforms.
Bonuses and special features help to bring online slots to life, adding extra layers of enjoyment and more opportunities to win.
Without trying to sound superficial, when it comes to slots, looks are just as important as the gameplay. Creative environments and immersive soundscapes can enhance a game’s narrative and create a more engaging experience.
Nothing gets us more excited than creative gameplay and game features to keep your online casino experience interesting. There’s so much more that developers can do with technology now, so we’re always looking out for something different that makes a game stand out from others in its category.
Invaders from the Planet Moolah doesn’t have a scatter symbol, so instead, you trigger the free spins bonus by hitting consecutive cascades on a base game spin. Anything over four cascades in a row will earn you free spins.
The highest-paying reel symbol is the jackpot symbol, which features three UFOs hovering over the word "JACKPOT." It offers payouts of up to 30x the bet for matching five of a kind on a payline.
You can play the Invaders from the Planet Moolah free demo game here at Casino.us. You can also click on “Play for free” on the game tile at the top of this page to start your session.
The published RTP for the Invaders from the Planet Moolah slot is 96%, which is well above the industry average. However, it’s essential to remember that RTP is a theoretical figure and not a guaranteed outcome of the game.
Yes, you can play Invaders from the Planet Moolah on your mobile device, either through a mobile casino app or by logging on through your mobile browser.