UK online slots by game type
Classic, fruit-machine and low-to-medium volatility slots
Players who prefer simple reels and frequent smaller wins often start with Starburst, the NetEnt game with expanding wilds and win-both-ways paylines. Its follow-ups, Starburst Jelly Beans and the much higher-volatility Starburst XXXtreme, keep the gem theme but change the maths considerably. Twin Spin, Reel Rush and Koi Princess are other NetEnt titles in this group, while Aloha! Cluster Pays swaps paylines for groups of matching symbols.
Pub-style fruit machines remain popular in the UK. Rainbow Riches and Rainbow Riches Pick n Mix from Barcrest use the familiar Irish theme, as do Lucky Leprechaun and Slots O' Gold. Fire Joker, Joker's Jewels, 7s to Burn and Juicy Fruits use classic fruit and number symbols, and Fluffy Favourites is a bingo-site favourite with its toy-grabber bonus. Cleopatra, DaVinci Diamonds, Shaman's Dream and Hot Slice round out the lighter, theme-led options.
Book, expanding-symbol and fishing slots
The 'Book' format uses one symbol as both wild and scatter, then expands a randomly chosen symbol during free spins. Book of Dead and Legacy of Dead from Play'n GO are the best-known examples, alongside Book of Ra Deluxe from Greentube and the unusually high published RTP of Book of 99 from Relax Gaming. Eye of Horus uses a similar Egyptian theme with symbol upgrades, and Rise of Olympus and Gonzo's Quest add their own collapsing-reel twists. Immortal Romance and Thunderstruck II are long-running Games Global titles with multi-level free spins.
Fishing slots collect cash-value fish with a fisherman wild. Fishin' Frenzy and Fishin' Pots of Gold from Blueprint Gaming, and Big Bass Bonanza, Big Bass Splash and Big Fishing Fortune from Pragmatic Play, all use variations on this idea. Theme-led feature games in this group include Huff and Puff, Rick and Morty Slots, The Dog House Megaways, Wolf Gold and Buffalo Blitz.
Megaways, cascading and cluster-pays slots
Megaways games change the number of symbols on each reel every spin, giving thousands of possible ways to win. Bonanza Megaways and Extra Chilli Megaways from Big Time Gaming started the trend; Temple Tumble Megaways, Buffalo King Megaways, Eye of Horus Megaways, Fishin' Frenzy Megaways, Gonzo's Quest Megaways and Piggy Riches Megaways followed. Star Clusters Megaclusters and Lil' Devil push the mechanic further.
Cascading and scatter-pays games such as Gates of Olympus, Sweet Bonanza, Sweet Bonanza CandyLand, Sugar Rush and Gems Bonanza remove winning symbols and drop new ones in. Reactoonz and Jammin' Jars use cluster pays, while Razor Shark, Razor Ways, Mental, Chaos Crew 2, Wild West Gold, Money Train 2 and Money Train 3 are high-volatility titles where results can swing widely between sessions.
Progressive jackpot and hold-and-win slots
Progressive jackpot games set aside part of each stake for a growing prize pool, which usually means a lower base-game RTP. Mega Moolah, Divine Fortune Megaways, Age of the Gods: God of Storms, Wizard of Oz, Wheel of Fortune Slots and Rainbow Jackpots all fall into this group. Jackpots are rare by design and should not be treated as an expected outcome.
Hold-and-win games lock special symbols in place for a set of respins. Chilli Heat, Mustang Gold, Congo Cash, Wild Wild Riches, 9 Pots of Gold, 9 Masks of Fire and Gold Blitz use fixed or collect-style jackpots within this format. Finally, Aviator is a crash game rather than a slot, so it has no reels or paylines and its outcomes work differently.
How to choose where to play slots in the UK
- 1
Check the UK licence
Only play at sites licensed by the UK Gambling Commission. Every casino we list is checked daily against the public register; you can confirm the licence number in the casino's footer.
- 2
Check the game's RTP setting
Many slots are released in several RTP versions. Open the game's information or paytable screen at the casino to see which version that site runs before you play.
- 3
Compare bonus terms for slots
Read the wagering requirement, eligible games, spin value, maximum bet and expiry. Some offers are tied to one named game, such as Big Bass Bonanza or Book of Dead.
- 4
Set limits before you deposit
Use deposit limits, reality checks and time-outs, available at all UK-licensed casinos. Treat slots as paid entertainment and only use money you can afford to lose.
Slots FAQ
Which slot in this directory has the highest published RTP?
Book of 99 from Relax Gaming has a published RTP of up to 99.00%. Reel Rush (97.00%) and Immortal Romance (96.86%) are also high. Casinos can run lower RTP versions, so check the game's information screen.
Can I play Starburst, Book of Dead or Big Bass Bonanza with welcome spins?
It depends on the offer. At the time of writing, PlayOJO includes spins on Big Bass Bonanza, Swift Casino includes spins on Book of Dead, The Online Casino includes spins on Gates of Olympus. Offers change, so always read the full terms on the casino's site.
What is the difference between high and low volatility slots?
Low-volatility slots such as Starburst tend to pay smaller amounts more often. High-volatility slots such as Money Train 3 or Mental pay less often but can pay larger amounts. Neither changes the long-term house edge.
Are RTP figures a guarantee of what I will win?
No. RTP is a theoretical long-term average over millions of spins. Individual sessions vary widely, and the house always keeps an edge.
Does UK Casino Wizard let me play these games?
No. We are a comparison site. We do not host games, take bets or hold funds. Games are played at the UK-licensed casinos we list.
Gambling should be entertainment, not a way to make money. If it stops being fun, get free, confidential help at BeGambleAware.org or GamCare (0808 8020 133).