Stack Up Pays Island Riches
About this machine
Riches rise like lava in Stack Up Pays Island Riches™! Incredible Technologies’ newest slot debuts on the sleek Prism Element™ cabinet with island heat.
243 Ways to Win are full of tropical symbols, but players are keeping their eyes peeled for surfboards! Two golden surfboards on reels one and three in combination with any colored surfboard on reel five will initiate its respective Free Spins Bonus! Stacked above the reels are Mini, Minor, Major, Grand, and Mega Free Spins, each keeping count of the awarded random expansions! Each number corresponds with the number of added reel expansions during Free Spins.
Free Spins are triggered by surfboards but can also be awarded with a pick bonus! Sun symbols are wild on the reels, then fly up to the volcano above. The mighty volcano grows and may rumble to spew lava and initiate a pick bonus! Players choose glowing lava rocks to reveal Free Spin bonuses. Once three of a kind are matched, the fun begins!
Each Free Spin event awards 10 free spins. The number of random expands is dependent on just how many surfboards were collected throughout play and how long the meter has grown! Each bonus has a must-hit-by limit for growing anticipation. Up to 350 expansions may be awarded for up to 100,000 Ways to Win on a spin! With each free spin, the reels shift and change as a random number of expansions are applied to each spin. Dynamic reels continue to shift until the final spin and all expansions have been used.
Description sourced from the manufacturer's public product page.
Stack Up Pays Island Riches on video
Real footage of this machine — 6 clips whose title names it. We index them; the videos live on YouTube. More on YouTube ↗
Artwork & cabinet
Official game video
Incredible Technologies's own demo reel for this machine. Open on YouTube ↗
Where Stack Up Pays Island Riches sits in Incredible Technologies's range
Stack Up Pays Island Riches is part of Incredible Technologies's Stack Up Pays line, which runs to 6 documented titles. Manufacturers ship a hit as a family rather than one box, so entries in a series share branding and often a bonus structure while carrying different maths.
It is listed on the Prism Element™ cabinet. The cabinet is the hardware — screen geometry, button deck, chair and speakers — and the same title is frequently released on more than one, which is why a game can look and feel different at two properties.
Why Stack Up Pays Island Riches doesn't have an RTP in the usual sense
This machine is designated HHR — historical horse racing. Despite the reels on the screen, it is not running a slot maths model at all: each play is a parimutuel wager settled against the archived result of a real horse race that has already been run, with identifying details stripped out.
That distinction is what lets these machines operate in states that never legalised slot machines — Kentucky, Virginia, New Hampshire and Wyoming among them. It also changes where the money comes from: payouts are funded from a wagering pool shared with other players, not from a fixed theoretical return set by the manufacturer.
So the honest answer is that the return depends on the pool and the takeout rate the operator applies, not on a par sheet inside this cabinet.
Reels, symbols and bonus animations on an HHR machine are a presentation layer over the race result. Incredible Technologies builds the cabinet and the presentation; the wagering system underneath is regulated as parimutuel racing.
Where to play
We don't yet have verified floor placements for this machine. Our casino cross-reference covers 442 properties, but only through IGT's public linked-progressive data — which doesn't reach Incredible Technologies titles. We would rather show nothing than guess.
Rest of the Stack Up Pays line
All 6 Stack Up Pays machines →6 titles carry this branding. They share artwork and usually a bonus structure, but each ships its own maths.
Other HHR machines from Incredible Technologies
Same regulatory class, same manufacturer.
