Reactor slot
Reactor is a Red Tiger slot with 5 reels, 3 rows and 20 paylines that pay both ways, set in a futuristic world of gems. Its features all come from batteries: one battery brings a respin, and each extra battery in the same spin adds another feature on top, from Swap Symbols and Random Wilds to a Mega Wild and, with five, a Random Multiplier.
Editorial note: this guide explains how Reactor works. Rules, features and payout figures are set by the studio and can differ between operators and game versions, so check the game’s information panel before you play. Slots are games of chance, and nothing here predicts results. Availability at Fortune Games can change.
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Reactor: key facts
| Studio | Red Tiger |
|---|---|
| Reels and paylines | 5 reels, 3 rows, 20 paylines that pay both ways |
| Maximum win | 5,000x stake |
| Symbols | Four gems in green, yellow, red and purple, and four futuristic gems in the same colours |
| Batteries | Trigger the features; each extra battery in a spin adds a feature, triggered in sequence |
| One battery | Respin |
| Two batteries | Respin and Swap Symbols |
| Three batteries | Respin, Swap Symbols and Random Wilds |
| Four batteries | Respin, Swap Symbols, Random Wilds and a Mega Wild |
| Five batteries | Respin, Swap Symbols, Random Wilds, a Mega Wild and a Random Multiplier |
| Autoplay and turbo | Not available at sites licensed in Great Britain; UK rules require at least 2.5 seconds between the start of one game cycle and the next |
| Stakes | UK rules cap online slot stakes at £5 a spin, or £2 if you are 18 to 24 |
| RTP | Shown in the game’s information panel |
| Series | Stand-alone |
All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.
How Reactor plays
Because the 20 lines pay both ways, a combination can be read from the leftmost reel or from the rightmost one. The regular symbols are gems: four plain stones in green, yellow, red and purple, and four futuristic versions of them in the same colours. Batteries are the symbols that drive everything else. Each battery that lands in a spin counts towards a chain of features, and the features are triggered in sequence, so a spin with more batteries gets everything a smaller count would have brought and more besides. The key facts table lists exactly what each count adds.
One to three batteries: Respin, Swap Symbols and Random Wilds
A single battery triggers a respin, a second turn of the reels. Two batteries bring that respin with Swap Symbols added to it. Three batteries add Random wilds as well, so the respin then carries all three of the first features at once. Each step keeps the ones below it, which is why the battery count, rather than the line win that came with it, is the thing to watch on the spin that triggers.
Four and five batteries: Mega Wild and Random Multiplier
Four batteries in one spin add a Mega Wild to the respin, together with Swap Symbols and Random Wilds. Five batteries complete the chain: the respin then carries Swap Symbols, Random Wilds, the Mega Wild and a Random Multiplier, so a five-battery spin is the only one that brings every feature in Reactor into play at the same time. The Random Multiplier sits at the very top of that chain and cannot arrive without the other four features.
Reactor compared with Gems Gone Wild
Gems Gone Wild is another Red Tiger slot filled with gems against a cosmic backdrop, on the same 5x3 grid with 20 paylines. Its respins come from wilds instead of batteries: any gem can turn wild at random, and each new wild triggers a free respin, a cycle that can repeat. Reactor keeps the gems and the 20 lines, makes them pay both ways, and turns the respin into a platform for a stack of features chosen by the number of batteries, rather than a loop driven by new wilds.
| Game | Grid and lines | What starts a respin |
|---|---|---|
| Gems Gone Wild | 5 reels, 3 rows, 20 paylines | A new wild: any gem can turn wild at random |
| Reactor | 5 reels, 3 rows, 20 paylines that pay both ways | Batteries: one to five, each extra battery adding a feature |
All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.
Reactor at Fortune Games
Reactor is listed with the slots in the Fortune Games lobby (18+); searching for its one-word name is the quickest way to the battery game. The UK caps in the table apply to every player. There is no autoplay or turbo mode, as at every site licensed in Great Britain. Fortune Games has an app on the App Store and Google Play.
Frequently asked questions
How many batteries does Reactor need for every feature?
Five in one spin. Each battery count from one to five adds a feature on top of the ones below it, so only the full set brings the respin, Swap Symbols, Random Wilds, the Mega Wild and the Random Multiplier together. With fewer batteries the respin still comes, along with whichever features that count unlocks.
Do Reactor wins pay from both sides of the reels?
Yes. The 20 paylines pay both ways, so a run of matching gems can be read from reel 1 towards the right, or from reel 5 towards the left. Red Tiger names this both-ways pay first in its own description of the game, ahead of the batteries and their respins.
What does the Reactor slot look like?
Red Tiger set Reactor in a futuristic world where the reels sparkle with gems. The regular symbols are four plain gems in green, yellow, red and purple and four futuristic versions in matching colours, while the batteries that land among them charge up the features.
Related guides
Checked on 12 November 2026 against Red Tiger’s Reactor game page and launch announcement, the VegasSlotsOnline and SlotCatalog records for Reactor, Red Tiger’s Gems Gone Wild game page and its VegasSlotsOnline record, and the Gambling Commission’s stake-limit and online games design guidance. How we research and check our guides: our editorial policy.