Overflowing Stacks
About this machine
Win up to 100 Free Games!
Features dual-screen attract mode
During the free games, reel backgrounds appearing with CHIP STACK design are nudged until all positions include the same background
Scatter symbol with a CHIP STACK backround becomes a Triple Scatter - equivalent to 3 Scatters and only appears on reel 5, during the free games
During the Lady Luck transformation feature, all symbols appearing with a CHIP STACK background become full reel LADY LUCK symbols
Available in Fixed 20, 30 and 40-line configurations with forced Extra Bet
Description sourced from the manufacturer's public product page.
Overflowing Stacks 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
Where Overflowing Stacks sits in Konami Gaming's range
It runs on Konami Gaming's KP3+ platform. The platform is the cabinet family — screen geometry, button deck, seat — and it is what you recognise from across a floor before you can read the title.
What's the RTP of Overflowing Stacks?
There isn't one number — and any site quoting you a single figure is describing a different product.
Manufacturers ship the same title in multiple par versions, commonly spanning roughly 85% to 96%. The casino chooses which one to install, and that choice is not disclosed on the machine. Nevada regulation only sets a floor: every wager must theoretically return at least 75%.
What regulators actually publish is hold percentage — realised performance after player behaviour, aggregated by region and denomination. It is never broken out by game title. So the honest answer for any land-based machine is a range plus an unknown configuration, not a single figure.
Figures quoted elsewhere for this title are almost always taken from its online version, which is a different product with a different maths model.
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 Konami Gaming titles. We would rather show nothing than guess.
Also on the KP3+ platform
The platform is the cabinet family — same screen geometry and button deck. If you can spot one of these across a floor, you can spot all of them.
Most-filmed Konami Gaming machines
All 654 Konami Gaming machines →The titles from this manufacturer that slot channels actually put on camera.
