An Australian studio invented a reel mechanic, patented it, and now licenses it to nearly every major developer in the industry. Understanding the arrangement explains a great deal about why the games feel similar.

Where it came from

Big Time Gaming, based in Sydney, released the mechanic in 2016. Reels that vary their height each spin were not new as an idea, but the specific implementation was protected, and rather than keeping it exclusive the studio chose to license it out. That decision shaped the following decade of slot design.

What the mechanic actually does

Each reel shows between two and seven symbols, decided fresh on every spin. Symbols connect left to right regardless of position, so the number of winning combinations changes constantly. A spin showing seven on all six reels produces the headline figure the format is named after.

Recognising a licensed title

The signature is unmistakable once you know it: six reels of shifting height, a horizontal reel across the top, and a combination counter that updates before the spin resolves. Filtering for the format on DemoSlotVibe and opening three titles from three different studios shows how little the core presentation varies between licensees.

The top reel

That extra horizontal strip adds two more positions to the four middle reels, which is where the largest combination counts come from. It is also the visual tell that separates a genuine licensed game from an imitation using a different name.

Why studios pay for it

Recognition. A player scanning a catalogue knows what a Megaways game does before opening it, and that shortcut is worth a royalty. The alternative is explaining a novel mechanic to an audience that will not read the explanation.

What the licence typically brings

• The variable reel height engine itself
• The top horizontal reel and its symbol positions
• Cascading wins as a standard accompaniment
• Use of the trademarked name on the loading screen
• Unlimited multiplier progression in the feature, in most builds

The volatility consequence

Combination counts that swing from a few hundred to over a hundred thousand produce enormously uneven outcomes. These games are high variance almost by construction, and a long unproductive stretch is the format working as designed rather than misbehaving.

The imitations

Several studios ship variable-reel games under their own names to avoid the royalty. They behave similarly and are perfectly legitimate, but the differences in reel count and top-reel handling mean the maths is not identical, whatever the resemblance suggests.

What has changed since 2016

The format matured and then saturated. Early licensed titles were genuinely novel; recent ones are frequently a standard game with variable reels attached, and the mechanic has become a marketing label as much as a design choice.

The summary worth keeping

Megaways is a licensed engine, not a studio and not a guarantee. It describes how the grid behaves and nothing about return, ceiling or fairness, all of which vary as widely across licensed titles as they do anywhere else.