Random wilds slots

What random wilds slots are

In a normal spin, a wild symbol only appears if a reel happens to stop on it. Random wilds bypass the reel strip. Something in the game, usually an animated character or effect, places wilds on selected positions before the reels finish, or turns entire reels wild. Because there is no visible trigger such as scatters, it feels like it comes from nowhere.

Random wilds belong to the broader group of random features, alongside random multipliers, symbol transformations and mystery prizes. They are most common in the base game, where designers use them to break up long runs of quiet spins, but plenty of free spins rounds use them too.

How a random wild is decided before the reels stop

Online slots use a random number generator that produces the full result of a spin, feature and all, when you press spin. The order of events inside the game looks like this:

1. You press spin; the stake is deducted.
2. The RNG draws a number that decides whether the random wild feature activates on this spin.
3. If it does, further draws decide how many wilds (or which reels) and where they go.
4. The RNG also draws the ordinary reel stops.
5. The game combines the two, applies the wilds and counts the wins.
6. Only then does the animation play: the reels spin, the character appears and the wilds drop in.

Steps 2 to 5 happen in a fraction of a second. The 2.5-second minimum game cycle that applies to UK online slots is mostly presentation of a result already settled, which is also why a random wild can’t be ‘caught’ or encouraged by how or when you press anything. Our page on how slot machines decide who wins covers the same process in general.

Types of random wilds in online slots

• Scattered random wilds: a set number of single wilds land on random positions, often thrown by a character.
• Random wild reels: one or more whole reels turn wild, which works like several wild reels at once.
• Raining wilds in free spins: each free spin gets a fresh batch of wilds in new places, rather than a single feature.
• Spreading or shooting wilds: a special symbol creates wilds along a row, column or path. In Hacksaw Gaming’s 2 Wild 2 Die, revolver symbols shoot multiplier wilds onto the reels (opens in a new tab), and in Beam Boys, Laser Cat wilds spread across rows (opens in a new tab).
• Random wilds with multipliers: the dropped wilds carry values; see wild multipliers.

Famous random wilds slots in the UK

Thunderstruck II is the reference design: its Wildstorm feature can strike on any base-game spin and turn several reels fully wild on a 243-ways grid, so a single activation affects every way through those reels. Immortal Romance uses the same idea under the name Wild Desire, alongside its four character free spins rounds.

The Dog House Megaways offers a choice at the start of free spins, and one option drops random wilds onto the reels each spin instead of keeping wilds sticky. Hacksaw Gaming’s 2 Wild 2 Die and Beam Boys are newer takes, where a symbol on the reels creates the extra wilds rather than an off-screen character.

Random wilds and RTP: a worked example

Every feature’s share of the RTP follows one formula: how often it happens multiplied by what it pays on average. Designers use this to balance a game. The figures below are invented to show the method; studios don’t publish feature frequencies.

If a slot’s total RTP is 96% and the random wild feature supplies 10 points of it, the rest of the game supplies 86. Make the feature rarer and richer and the slot becomes more volatile without the RTP changing at all. This is why two games with identical RTP figures can feel completely different to play.

How often a random wild feature might show up in a session

Using the illustrative 1-in-200 feature from above, the chance of seeing it at least once grows with the number of spins, but never reaches certainty. The table pairs that with what the spins cost at 20p and a 96% RTP.

Even a feature built to appear once every 200 spins on average misses six sessions in ten that last 100 spins. And seeing it doesn’t mean a profit; many activations pay less than the spins it took to reach them. The bonus trigger odds guide uses the same arithmetic for free spins.

Random wild myths

• ‘The feature hits more after a long dry spell.’ Each spin’s draw is independent. A long gap doesn’t raise the chance on the next spin.
• ‘Random wilds that fail to win are rigged to miss.’ Wilds are placed by one draw and the reels by another; sometimes they simply don’t line up with matching symbols. That is part of the RTP calculation.
• ‘Pressing spin at the right moment triggers it.’ The result is set when the spin starts. Timing makes no difference (is stopping the reels a skill?).
• ‘Teaser animations mean it was close.’ Some games show build-ups that don’t activate. They carry no information about future spins.

Random wilds and fruit machine random awards

Pub fruit machines have long used random awards: a light runs round the feature trail and lands on a prize, or the machine offers nudges and holds out of the blue. Modern Category C machines (£1 maximum stake, £100 maximum prize, 18+) often add video features, and random wild effects can appear there too.

There is one important difference in history. Some land-based machines have been designed as compensated machines, adjusting what they award to stay near a target payout percentage, whereas online slots draw each spin independently. Either way, the built-in percentage decides the long-run result, and no way of using holds, nudges or timing beats it.

UK rules that apply to random wilds slots

The Gambling Commission’s remote technical standards (opens in a new tab) for slots, in force since 31 October 2021, shape how random wild features can be presented.

• No autoplay: every paid spin is started by you, however often features fire.
• At least 2.5 seconds per game cycle, with no turbo or slam-stop, so animations can’t be skipped to speed play up.
• A random wild that produces a return equal to or less than the stake must not be celebrated as a win (why a win might not celebrate).
• £5 per spin maximum for players aged 25+, £2 for 18–24s; no feature buy in slots supplied to Great Britain.

Where to play random wilds slots

Games such as Thunderstruck II and Immortal Romance are widely distributed, but lobbies differ and change, so search each casino for the title. The partner offers below are for new customers aged 18+, and terms apply.

• Coral Casino: bet £10 on slots, get 100 free spins at 10p each on selected games; accept within 48 hours, use within 7 days, no wagering on winnings. Runs 1 October 2026 to 1 February 2027; certain payment types, including PayPal, Skrill and prepaid cards, don’t qualify.
• Ladbrokes Casino: play £10 on slots, then receive 50 free spins a day for 10 days (500 maximum), 10p each on selected games, claim before 23:59 each day, valid 7 days, no wagering. Some e-wallet and prepaid deposits are excluded.
• PlayOJO: 80 free spins on Big Bass Bonanza worth 10p each when you first deposit £10 or more; no wagering and cash winnings. Not open to Northern Ireland residents.

Coral and Ladbrokes are both run by LC International Limited (Entain); check the terms if you hold an account with either. Slots are paid entertainment with a built-in house edge, and if you need a break, GAMSTOP (opens in a new tab) lets you self-exclude from all UK-licensed gambling sites.

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.