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Feature · mechanics

Slots with additive symbol

10 games in the pool · feature tag Additive symbol · newest first

Looking for games where an additive symbol sets the pace? 10 titles in the pool have the feature listed in the rules, from 9 different studios with NetGaming and Play'n GO at the top.

We take the tag straight from the catalogue instead of interpreting game demos. That makes the list honest but blunt: two games with the same tag can still feel very different at the reels.

Games in the selection10out of 54 in the pool
Providers9represented
RTP span93,2–96,2 %10 of 10 games
Highest max win50 000×Colt Lightning Inferno
Newest in the selection05/2026newest first in the list

How games are selected

The criterion, the order and the edge cases

The criterion

The feature list in the game's own rulebook must include "Additive symbol. Marketing copy on the casino's game page does not count.

What does not determine

How good the feature is. This page collects games that have the mechanic, not games that use it well — that assessment is in each game's review.

The order

Newest first by release date. Games without a published date end up last.

Honesty note: 10 of 54 games in the pool carry the tag Additive symbol. The tag indicates the feature exists — not how often it triggers or what it's worth. We make that assessment per game, on the game's page.

All 10 games with the feature

Newest first

The entire pool
Colt Lightning Inferno Colt Lightning Inferno Play'n GO RTP 96,2 % · Max 50 000× Fireball Inferno: Tiki Blast Fireball Inferno: Tiki Blast NetGaming RTP 94,3 % · Max 1 556× Coin Inferno Step 'N' Stack Coin Inferno Step 'N' Stack Inspired Gaming RTP 94,5 % · Max 2 500× Anika Axton Inferno Anika Axton Inferno Betixon RTP 93,2 % · Max 1 000× Piggy Inferno Piggy Inferno Platipus RTP 96,1 % · Max 1 000× Inferno Coins: Ultimate Inferno Coins: Ultimate Fugaso RTP 96,1 % · Max 3 000× Aztec Inferno: Gold Eruption Aztec Inferno: Gold Eruption All For One Studios RTP 96,0 % · Max 5 000× Fireball Inferno Tiki Fireball Inferno Tiki NetGaming RTP 94,3 % · Max 1 300× Super Golden Dragon Inferno Super Golden Dragon Inferno Betsoft RTP 94,2 % · Max 2 916× Chilli Inferno Chilli Inferno Oros Gaming RTP 96,2 % · Max 10 000×
Play slots with additive symbol The selected games are available at our partner casino, in demo mode or for real money. The buttons are advertisement links.
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Features that often come with

Mechanics that recur in the same game

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Guides & news

From the editorial team — directly

The whole blog
Guide Volcanic eruption with fireworks over the crater How to choose the right inferno-slot: RTP, volatility and max win explained Three numbers go a long way — if you know where to look and what they actually mean. Elin SandgrenElin Sandgren Test Desk with phone and lava lamp Mobile slots: how we test every game before it gets into the guide Load time, buttons, autospin — our seven-point checklist for mobile games. Elin SandgrenElin Sandgren Casino Stack of shiny chips Quick withdrawals: what separates a good casino from a slow one What operators actually publish about withdrawal times — and what the silence means. Rasmus HjortbergRasmus Hjortberg

Frequently asked questions

About the Additive Symbol feature

What does additive symbol mean in practice?
That the game’s rules sheet lists the mechanic. Exactly how it’s triggered and what it awards is stated in the rules on each game page — it varies between providers.
Can a game have multiple features at the same time?
Yes, and most do. The pool's games carry on average several feature tags, so the same title appears in multiple selections.
Does the feature increase the chance of winning?
No, not in itself. RTP and volatility describe the outcome over time; the feature describes how the game feels on the way there. Both numbers are shown on the game page.
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