Slot Mechanics

Almost every phrase on a slot's promo banner describes a mechanic, and most of those phrases are trademarks rather than descriptions. Megaways, Infinity Reels, Hold & Win, cluster pays: each is a specific rule about how symbols land, stay, multiply or recount, and each belongs to a family that several studios have their own name for.

These entries take the marketing apart. What changes on the reels, what the mechanic does to the number of ways a spin can pay, where the volatility goes, and which other mechanic it is usually paired with. The aim is that you can read an unfamiliar game's rules screen and recognise the family it came from.

Mechanics interact, which is where most confusion starts. A respin feature on top of a cluster grid behaves nothing like the same respin on five fixed reels, and a multiplier attached to a wild is a different thing from a multiplier attached to the whole win. Where an entry depends on another, it links to it rather than repeating it.

Nothing here is a strategy. Reel mechanics change the distribution of outcomes, not their randomness, and no sequence of spins can be steered. What they do change is what a session feels like — and that is worth knowing before you pick a stake.

Trademarks are the practical problem these entries exist to solve. A licensed mechanic can only be called by its own name by the studio that owns it or by a licensee, so every competitor invents a label for the same rule: the grid grows, the symbols lock, the ways recount, and the game screen calls it something you have never seen before. Read the rule rather than the badge and most of the catalogue collapses into a handful of families — which is exactly what the naming maps in this section set out, family by family, with the names each studio uses for its own version.