Stack 'Em Pokie Guide: Clusters, Multipliers and Max Win

Stack 'Em comes from Hacksaw Gaming, a studio known for compact but mechanically dense games. It was released in 2021 as a follow-up to Stick 'Em, and it carries over the same cartoonish world, this time starring Canny the Can and Mona the Mouse. The visual style is deliberately retro, with bold colours and simple shapes, but the gameplay underneath is more complex than it looks.

The format is a 5x6 cluster grid. Instead of fixed paylines or ways, wins are formed when five or more matching symbols connect horizontally or vertically. After a win, the winning symbols remain on the grid while non-winning symbols drop away, allowing new symbols to fall into place. This cascade mechanic can create a chain of wins from a single spin.

The structural twist is that winning symbols stack on their reels. Each stacked win increases a multiplier for that reel, up to 6x per reel. With five reels, the total multiplier can reach 30x. This is a different approach from most pokies, where multipliers are usually tied to individual spins or features rather than building across a single cascade sequence.

To play Stack 'Em, set your bet using the bet selector, which ranges from $0.20 to $100 per spin. The game uses a 5x6 cluster grid, so wins are formed when five or more matching symbols connect horizontally or vertically. After a win, winning symbols stay in place while others cascade away, potentially creating chains of wins. The paytable and info panel are accessible via the game's menu, where you can also check the RTP version. The spin button starts a round. If you want direct entry into the free spins feature, you can use the bonus buy option, which costs 129x your current bet. This is a significant outlay, so consider your bankroll before activating it. There is no ante bet in this game.

The key features in Stack 'Em work together to build bigger wins over a single sequence.

• Cascades: When you get a winning cluster, those symbols stay on the grid. All other symbols drop away, and new ones fall in. This can trigger further wins, and each cascade continues the same multiplier-building process.
• Stacked winning symbols and reel multipliers: Each winning symbol that lands on a reel increases that reel's multiplier by 1, up to 6x per reel. The total multiplier across all five reels can reach 30x. For example, if you get wins on reels 1, 2, and 3, each with a 2x multiplier, your total multiplier is 6x, which applies to your next win in the same cascade.
• Free spins: Landing three or more scatter symbols triggers free spins, starting at five spins. During free spins, a progressive global multiplier builds with each win, and it applies to all wins in the feature.
• 'X' symbol: This special symbol applies the accumulated multiplier to the current win, effectively cashing in the built-up value.
• '?' symbol: This symbol adds extra spins or increases the multiplier, depending on what it reveals.
• Bonus buy: You can purchase direct entry into the free spins feature for 129x your bet.

The default RTP for Stack 'Em is 96.2%. According to Hacksaw Gaming's release notes, there are three RTP levels available, with 96.20% being the default. The lower levels are not published on the sources we checked, so we can't give exact figures. What matters is that a lower RTP version will return less to players over time. For example, if a version had an RTP of 95.2%, that's a 1% difference, which means for every $100 wagered, you'd expect to lose $1 more on average compared to the default version.

The maximum win is 10,000x your stake. If you bet $1, a max win would pay $10,000. If you bet $5, it would pay $50,000. This is a high multiple, but it's not a common outcome.

Before you play, check the RTP version in the game's info panel. Different casinos may use different versions, and knowing which one you're playing is part of making an informed choice.

Stack 'Em is a high-volatility game. That means wins come less often, but when they do, they tend to be larger. For a $50 session, a sensible bet is around $0.50 per spin. That gives you 100 spins, which is enough to see how the game behaves without blowing through your bankroll too quickly. For a $200 session, you could go up to $2 per spin, giving you 100 spins at that level. If you prefer a longer session, drop the bet to $1 and you'll get 200 spins.

The bonus buy costs 129x your bet. If you're betting $1, that's $129 for one entry into free spins. That's a significant outlay, so it's only worth considering if you have a bankroll that can absorb the cost without affecting your ability to play.

No betting system changes the RTP. The game's return is set by the maths, and no pattern of bets will alter that. The only thing you control is how much you wager and how long you play.

The demo mode at any casino uses play credits but the same maths and RTP version as the real-money build. For a high-volatility game like Stack 'Em, a demo session is useful to see how often the cascades and free spins trigger, and to get a feel for the bet range from $0.20 to $100. You can test different bet sizes to see how they affect your session length. With real AUD, bets are real and limits matter, so the demo helps you decide on a comfortable stake before committing funds.

You can play Stack 'Em at Coincasino, More Chilli. They offer the game in AUD, and there's a demo mode so you can try it for free before you spend any money. When you do play for real, it's worth checking which RTP version they're using, as it may differ from the default. If you or someone you know needs help with gambling, contact Gambling Help Online at 1800 858 858. Play responsibly.

Temple Tumble Megaways — Both use cascading wins and high volatility, but Temple Tumble Megaways has a 6-reel Megaways layout and a max win of 7,767x, lower than Stack 'Em's 10,000x. It also offers selectable free spins modes, while Stack 'Em uses reel multipliers.

Starlight Princess — Starlight Princess shares high volatility and cascading wins, with a 6x5 grid and a max win of 5,000x. It features multiplier symbols that accumulate during free spins, similar to Stack 'Em's progressive multiplier, but lacks the reel-specific stacking.

Rise of Olympus — Rise of Olympus also uses cascades and a win multiplier that grows, but on a 5x5 grid with a max win of 2,500x. It has a lower volatility and different theme, and its multiplier is capped at 20x in free spins, while Stack 'Em can reach 30x.