Slots in the 97% band pay back between 97.00% and 97.99% of what is staked over the long run, so the house keeps 2p to 3p of every pound. Big Bass Boom heads it at 97.97%, Starmania leads the older favourites at 97.87%, and Texas Tea pairs 97.35% with low volatility.
Most of the familiar games in this band are older releases from NetEnt, NextGen, IGT and Red Tiger. The newer ones in our catalogue come from Reel Kingdom and from Valkyrie Studio, whose games run only at Stake. A high return lowers the long-run cost but tells you nothing about how bumpy a session will feel, so the volatility column below matters as much as the RTP one.
Familiar Names in This Band
| Game | Studio | RTP | Volatility | Biggest win | How it pays |
|---|---|---|---|---|---|
| Starmania | NextGen (Light & Wonder) | 97.87% | Low to medium | About 500x | 10 lines |
| Blood Suckers Megaways | Red Tiger | 97.66% | High | 20,521x | Up to 117,649 ways |
| Texas Tea | IGT | 97.35% | Low | 10,000x the line bet | 9 lines |
| Secrets of Atlantis | NetEnt | 97.07% | Medium | 1,600x | 40 ways, paying in both directions |
| 9K Yeti | 4ThePlayer | 97.00% | High | 9,012x | 4,096 ways |
Starmania is a neon space game from the NextGen catalogue, now part of Light & Wonder, and Texas Tea is IGT’s oil-field cabinet game from 2005. Both are plain line games, with no ways engine or cascades to follow.
Blood Suckers Megaways is Red Tiger’s remake of a NetEnt vampire classic; the original Blood Suckers is a separate game with its own figure. Secrets of Atlantis has expanding wilds and counts wins from both ends of the reels.
9K Yeti lands exactly on the lower edge of the band, with Snowstorm free spins on a six-reel grid. Its follow-up, 9K Yeti Gold, returns 94.08%, so a familiar name is no promise of the same return.
How Much Less a High-Return Slot Costs
The difference is clearest over a long run of stakes. The last column is the average the game holds on to from every £1,000 played through it:
| RTP | Example | Kept per £1,000 staked |
|---|---|---|
| 96.00% | A typical modern slot | £40.00 |
| 97.00% | 9K Yeti | £30.00 |
| 97.35% | Texas Tea | £26.50 |
| 97.87% | Starmania | £21.30 |
| 97.97% | Big Bass Boom | £20.30 |
£1,000 staked is less than it sounds: it is 1,000 spins at £1, a little under two hours at a steady pace. Over that run Big Bass Boom costs about half as much on average as a 96% game, and moving from the bottom of the band to its top saves close to £10. The big hits most people know sit near the first row: Book of Dead at 96.21%, Sweet Bonanza at about 96.48% and Gates of Olympus at about 96.50%. They have a page of their own under 96% RTP slots.
A single session can still end well above or below these averages, and on a high-volatility game the gap tends to be wide. At UK-licensed casinos a slot spin tops out at £5, or £2 for players under 25, so at the full £5 an hour of 600 spins on a 97.00% game still averages a £90 cost.
A High Return Can Still Mean a Bumpy Ride
A game’s return and its volatility are set separately in its maths. Texas Tea and Starmania sit at the calm end, where the balance moves in smaller steps. 9K Yeti, Blood Suckers Megaways and Big Bass Boom are high-volatility games, which hold most of their return back for rare bonus rounds, so long quiet spells in between are part of the design. Two games at 97% can cost the same on average and feel nothing alike.
The return says nothing about the ceiling either. In the table above, the highest return comes with the smallest top win. Anyone choosing by temperament can start from our low-volatility slots or high-volatility slots pages and then compare the return.
The Band’s Games in Our Own Catalogue
Big Bass Boom has the highest return in the band at 97.97%, well above the 96.71% of the original Big Bass Bonanza. It is a Reel Kingdom game, released through Pragmatic Play, and keeps the series format: a 5×3 grid with ten fixed lines, money fish that the fisherman wild collects in free spins, and dynamite, hook and bazooka modifiers on top. Its top win is 5,000x the stake.
The other four come from Valkyrie Studio and are each listed at 97.70%. Four Leaf Fortune is the calm one, a low-volatility 5×4 game with 40 lines and a 10,000x top. Tome of Hades pays in clusters on a 5×5 grid, with a volatility switch and a 33,333x top. Hel’s Domain is a six-reel game at very high volatility with a 20,000x top, and Angel of Asgard climbs through tiered free spins. All four are Stake Engine games found only at Stake, and Stake’s own terms exclude players in the UK.
Why the Same Slot Can Return Less Elsewhere
Most studios ship a game in several RTP versions and let each casino choose one, so a slot listed at 97% can run lower at the casino you use. The help or paytable screen of the game at that casino shows the version in force, and that is the figure that counts. The Valkyrie games are the exception, as each runs at a single casino with one figure.
Some lists quote a higher return that applies only when a bonus round is bought. Bonus buys are not sold at UK-licensed casinos, so those figures never apply to UK play and the base game’s return is the one to go by.
Lists also draw the band in different places. Here it means a default return from 97.00% to 97.99%, while some RTP checkers round anything from 96.50% upwards into “97%”, so a game can appear under 97% on one site and 96% on another. The two-decimal figure is the one worth comparing.
Where Returns Climb Higher
One band up, our 98% RTP slots are fewer, led by Thunderkick’s 1429 Uncharted Seas at 98.6%, with several Valkyrie games at 98.00%. A small 3×3 game from BGaming, Cat’s Soup, also lands in that band with a 98.06% default. At the very top, the 99% RTP slots page covers Ugga Bugga, Mega Joker and Book of 99, where the trade for the higher return is usually a smaller ceiling or a mode that has to be switched on.
