Danger High Voltage slot

What the Danger High Voltage slot is

Big Time Gaming, the Sydney studio best known for inventing Megaways, made Danger High Voltage as a fixed-grid game rather than a Megaways one. It has six reels and four rows, giving 24 positions, and pays any matching symbols on adjacent reels from the left, whatever row they sit in. The theme is a loud, neon-lit electric party, matched by a high-energy soundtrack.

Big Time Gaming is now part of Evolution, after a deal announced in April 2021. Its games often combine a moderate base game with features that can produce very large results, and Danger High Voltage's 15,746x ceiling fits that habit.

How the Danger High Voltage slot machine pays: 4,096 ways

On a ways-to-win slot, you don't pick lines. A win needs the same symbol on reel one, reel two and reel three (and onwards), in any row. Each combination of positions is one 'way'. With four rows on each of six reels, the number of possible ways is 4 × 4 × 4 × 4 × 4 × 4 = 4,096.

Worked example: reel one shows one bell, reel two shows two bells and reel three shows one bell, with no bells on reel four. That is 1 × 2 × 1 = 2 ways of three bells, so the three-bell prize is paid twice. If reel four also had two bells, the result would be 1 × 2 × 1 × 2 = 4 ways of four bells instead. It is the same logic as 243 ways on a 5×3 grid, just bigger.

1. Set the stake, which covers all 4,096 ways.
2. Press spin; the random number generator fixes every reel stop.
3. The game counts matching symbols on adjacent reels from the leftmost reel.
4. Each symbol's total is multiplied by the number of ways it forms.
5. Any wild features apply, and three or more scatters lead to the free spins choice.
6. Wins are paid and the net position on screen updates.

Danger High Voltage wilds in the base game

The base game uses special wild reels, each with a name from the theme, that can cover an entire reel. A full wild reel counts as all four positions on that reel, so it multiplies the number of ways rather than adding a single symbol. One of the wild types also carries a wild multiplier.

Because the effects depend on which reels they appear on and the multipliers in the version you play, read the help screen for the exact rules. The key point is that the base game holds a meaningful share of the return through these wilds, which is one reason the game is rated medium-high rather than high volatility.

Danger High Voltage free spins: choosing your round

Landing the scatter symbols on enough reels triggers the free spins, and you then choose between two rounds. Big Time Gaming's game page describes the game as having two features to choose from, one of which gives 'a random symbol as a sticky wild for the duration of the feature'.

The help screen gives the number of spins and multiplier values for each round. Neither choice is better in the long run: games that offer a choice of features are normally designed so each option returns about the same over many rounds, with a different spread of results. The two rounds differ in how their results are spread, and the help screen describes each one before you choose.

Danger High Voltage RTP: which figure applies?

Published figures for Danger High Voltage give an RTP of 96.22%, while Big Time Gaming's own game page lists 95.67%. Both may be correct for different versions: studios often supply several RTP variants, and casinos pick one. The only figure that applies to you is the one in the game's rules at your casino, which the Commission's game rules and likelihood of winning standard (opens in a new tab) requires to be shown.

At 95.67%, the average cost of 100 spins at £1 would rise from £3.78 to £4.33. That gap is small over one session and larger over many. Use the slot cost calculator to compare versions at your own stake.

Danger High Voltage max win at UK stakes

The published max win is 15,746 times the stake, a high figure for a fixed-grid game:

In Great Britain, online slot stakes are limited to £5 a spin for players aged 25 and over and £2 for those aged 18 to 24; the Gambling Commission's online slots stake limit guidance (opens in a new tab) explains both. A result near the cap requires full wild reels with high multipliers during free spins, and is very rare. Our max win caps page explains how such ceilings are set.

How to check the Danger High Voltage RTP

1. Open Danger High Voltage at your casino.
2. Tap the menu or information icon.
3. Read through the rules to the theoretical RTP line.
4. Note whether it shows 96.22%, 95.67% or another figure.
5. Decide whether you're happy to play that version.

More detail is in our guide on how to find a slot's RTP.

UK rules on the Danger High Voltage slot

Since 31 October 2021 the Commission's responsible product design standard (opens in a new tab) has applied to all online slots in Great Britain. On Danger High Voltage, that means no autoplay, no turbo, no slam-stop, at least 2.5 seconds per spin and no celebration of a return equal to or less than the stake. With 4,096 ways, small wins smaller than the stake are common, so that last rule matters: see losses disguised as wins.

British versions also come without a bonus buy, so the free spins choice can only be reached in normal play. Our guide to UK slot machine rules covers the full set.

Danger High Voltage 2 and similar Big Time Gaming slots

Big Time Gaming followed up with Danger! High Voltage 2, a separate game with its own maths; don't carry the original's RTP or max win across. Other well-known titles from the studio include Bonanza Megaways, Extra Chilli and White Rabbit Megaways, which use the Megaways mechanic that the studio created.

Is the Danger High Voltage slot worth playing?

It suits adults who like ways-to-win games and enjoy choosing a feature, and who accept that the biggest results are rare. If you'd rather have a single, simple feature, compare it with the classic games in our slot reviews.

Danger High Voltage myths

Our page on whether slot machines are rigged explains how fairness is tested.

Danger High Voltage demo

Trying the demo is a good way to compare the two free spins rounds without money at stake. In Great Britain, free play has required age verification since May 2019 (opens in a new tab). Our demo slots guide explains what to expect.

Where to play Danger High Voltage in the UK

Big Time Gaming titles are stocked by many UK casinos, but lobbies change, so search for Danger High Voltage at the casino before you join. Our partner offers are below. Coral gives new players 100 free spins at 10p each after depositing and betting £10 on slots; Ladbrokes gives 50 free spins a day for 10 days, up to 500 at 10p each, after £10 of slot play; PlayOJO's 80 no-wagering spins, on a first deposit of £10 or more, are on Big Bass Bonanza. Offer spins are for selected games. 18+, new customers, expiry and payment terms apply.

Set a deposit limit before you start. GamCare (opens in a new tab) runs the free 24-hour National Gambling Helpline on 0808 8020 133 if you want to talk.

18+. Gambling should be entertainment that costs money, not a way to make it. Decide a budget before you play: plan a slot budget. Free, confidential help: National Gambling Helpline 0808 8020 133.