3 Best Slot Machines to Play at Hollywood Casino

Invaders From the Planet Moolah is a good pick for players who like simple cascading mechanics without too many overlapping bonus features. Winning symbols disappear, new ones fall into place and another win can form without requiring an additional paid spin.

Combined with its retro science-fiction theme, that makes the game relatively easy to follow compared with slots built around multiple progressives or hold-and-spin mechanics.

The game is available at Hollywood Casino St. Louis. A Hollywood Casino St. Louis property guide updated Dec. 3, 2025, lists it among the casino’s featured slots, and recent on-floor footage was recorded at the same property.

I’d recommend it most to players who enjoy cascading wins and straightforward bonus mechanics. The presentation feels dated compared with newer cabinets, however, and the base game can become repetitive when cascades or free spins are slow to appear.

One important caveat is RTP. The 96% figure sometimes quoted for Invaders From the Planet Moolah comes from an online version, so it shouldn’t be applied to the physical St. Louis machine. Check the cabinet’s Help or Game Rules screen for the active paytable, denominations and wagering options.

Little Shop of Horrors stands out for feature variety, combining free spins, pick bonuses, respins and progressive elements in one game.

Developed by casino game manufacturer Everi, the current Empire Flex/MPX edition uses five reels and 30 paylines, has a listed RTP of 96.1% and carries a volatility rating of three out of five. Features such as Mean Green Mother Free Spins, Somewhere That’s Green Pick and Suddenly Seymour Respins give players more to look for than in a traditional reel slot.

The game is also listed in the December 2025 Hollywood Casino St. Louis inventory. However, that listing doesn’t specify whether the installed machine is the Empire Flex/MPX edition or the separate Director’s Cut release, so it’s worth checking the cabinet before relying on version-specific details.

The published wager range for the Empire Flex/MPX version is 75 to 375 credits. At a 1¢ denomination, that works out to $0.75 to $3.75 per spin, while 2¢ or 5¢ denominations increase the cost considerably. That higher minimum wager is the main drawback for budget-conscious players. The number of random and progressive features may also feel busy if you prefer simpler slots with more transparent base-game mechanics.

Overall, Little Shop of Horrors is best suited to players who enjoy feature-heavy slots and don’t mind a higher minimum wager. Check the cabinet’s Help or Game Rules screen for the paytable, denominations and betting options available at the property.

Buffalo Ascension is a strong pick for players who like slots that visibly change as features build. Its persistent reel-growth mechanic can expand the layout to as many as 5,488 ways to win, while Stampede and Super Stampede features add Buffalo symbols to the reels for the rest of the spin.

A gold arrow on the third reel can award the progressive, and the free-games feature keeps its triggering reel seven positions high.

What makes the Aristocrat’s game interesting is that some of its progress carries over visually rather than disappearing after every spin. That gives you something easy to follow as you play, although the most appealing moments are concentrated in expanded reel states, free games and progressive features. The persistent display can also make the machine look as though another feature is getting closer, but that doesn’t mean a bonus is guaranteed or “due.”

Current third-party slot-location data lists Buffalo Ascension at several Hollywood Casino properties, including Hollywood Casino York, Hollywood Casino at The Meadows, Hollywood Casino at Penn National Race Course and Hollywood Casino Morgantown. Because these aren’t live casino floor maps, I’d confirm availability with the specific property before making a trip just to play it.