Free spins are a run of spins with no stake deducted, launched by scatters or a special combination. The phrase sounds the same everywhere, but the rounds underneath differ a lot: what accumulates, what you can choose, whether the run can be extended.
The clearest case of accumulation is Kalamba Games’ Blazing Bull (21 April 2020). Silver and gold meters sit above the reels, each bonus symbol in normal play adds to its meter, and the meter sets how many spins the next trigger awards. After the round the meter drops to its starting value. Crucially, it changes the length of the round, not the chance of starting one. Expect 97.42% RTP and a top win of 6,480x.
What you can win inside the round
In Blueprint Gaming’s Fishin’ Frenzy The Big Catch (21 May 2021) the free spins are about collecting fishermen: four of them upgrade the small fish and give 5 extra spins. It runs on 10 lines with 95.32% RTP. In Habanero’s Hot Hot Fruit (29 January 2019) six free games start from Wilds read left to right or right to left, meaning reels 1 and 2 or reels 4 and 5. The listed RTP is 96.71%.
GameArt’s Dragon King (7 October 2014) runs on 50 lines with no surprises: dragon stacks fill the reels more often in free spins, so payouts build gradually. Volatility is low. In Nolimit City’s True Grit Redemption (21 December 2021) three scatters start eight or more Torture Spins and unlock the locked part of the grid. The “8+” means the count can grow, though the studio does not say what it is made of.
In Betsoft’s Gold Nugget Rush (24 April 2025) only premium symbols remain in free spins, with a 12,395x cap. And Evoplay’s Temple of Thunder II (January 2024) leans on coins and Hold&Win, so its Wild works on any reel in both the main game and free spins.
Before picking, see whether the round can be lengthened and whether the run carries a multiplier. A full breakdown of which bonus rounds deserve their price is in the article on free spins, retriggers and multipliers.