Stormborn — Bonus Features
Five bonus rounds sit behind Stormborn's scatters, and on three or four of them you pick which one you get rather than being dropped into it. Here’s what every feature does with your bet.
How Each Feature Pays
Trigger, mechanics, multiplier ranges and what each one is worth. New to the reels? Start with the Stormborn how-to-play guide.
Thunder Respins
How to Trigger
Five or more Coin symbols of any kind landing at the same time in the base game.
What Happens
The grid locks and the reel set changes: only Coins, Collector Chests and dead symbols can drop. Dead symbols pay nothing and do nothing else. Every Coin and every Chest that lands is sticky for the rest of the sequence, and each new one buys another respin. The moment a respin produces neither, the sequence ends and all Coins on the grid turn over to reveal cash values — Bronze 0.5x, 1x, 2x, 3x or 4x; Silver 5x, 10x, 15x or 20x; Gold 25x, 50x, 75x, 100x, 250x or 500x your bet. Once every Chest has collected, the grid is cleared of Coins, Chests and dead symbols before the next spin.
Multipliers
No round multiplier of its own. The Coin values are the payout, and any Collector Chest multiplier is applied on top of them.
Worth Knowing
Nothing to steer once the lock happens. What decides the size of the round is how long the Coins keep arriving and whether a Chest shows up while the board is full.
| Trigger | 5+ Coins at once |
| Grid | 5 reels × 4 rows |
| Sticky | Coins and Chests |
| Coin bands | Bronze / Silver / Gold |
| Top Coin | 500x stake |
Collector Chests
How to Trigger
A Collector Chest landing during a Thunder Respin sequence.
What Happens
Chests wait until every Coin on the grid has revealed its cash value. Then each one activates and collects every Coin on the board. A Chest that landed with a multiplier reveals it after collecting and applies it to the total it just gathered — the possible values are x1, x2, x3, x4, x5, x10, x15 and x20. If more than one Chest is on the grid they fire one after another, top to bottom then left to right, and each applies its own multiplier to the Coins it collected. Coins keep their original values when a second Chest collects them, so two Chests on a full board each pay the whole board.
Multipliers
x1, x2, x3, x4, x5, x10, x15 or x20, applied to everything the Chest collects.
Worth Knowing
The value case is a multiplier Chest arriving late, after the board is already covered in Coins — or two Chests on the same full board, since each one collects it in full.
| Effect | Collects every Coin on the grid |
| Multipliers | x1 to x20 |
| Several Chests | Each collects the board in turn |
| Order | Top to bottom, left to right |
| Appears in | Thunder Respins |
Bonus Choice: Stormbreaker and The Wild Storm
How to Trigger
Three FS scatter symbols landing at the same time in the base game.
What Happens
Three scatters open a menu with two options rather than dropping you straight into a round. Stormbreaker gives three free spins, and every one of them starts a fresh Thunder Respin sequence with at least 2 Coins and 1 Collector Chest guaranteed. The Wild Storm runs ten free spins on a different principle: every Wild that lands is sticky for the rest of the bonus and carries a multiplier worth 1x through 10x, or 25x, 50x or 100x. Wild multipliers on the same winning line are added together before they are applied. Four Wilds covering a whole reel fuse into a Wild God Reel whose multiplier is the sum of all four, and that reel sticks for the rest of the round too. Landing 2 more FS symbols mid-bonus adds 2 spins; 3 more adds 4.
Multipliers
Wild multipliers of 1x-10x, 25x, 50x and 100x, summed across a line and summed again into a Wild God Reel.
Worth Knowing
Stormbreaker is three guaranteed respin rounds — short, dense and driven by Coin values. The Wild Storm is the longer, more volatile pick, where the payoff depends on Wilds stacking up before the ten spins run out.
| Trigger | 3 FS scatters |
| Stormbreaker | 3 spins, 2 Coins + 1 Chest each |
| The Wild Storm | 10 spins, sticky Wilds |
| Wild multipliers | 1x-10x, 25x, 50x, 100x |
| Retrigger | +2 spins (2 FS), +4 spins (3 FS) |
Bonus Choice: Legacy of Lightning and Hammer of the Heavens
How to Trigger
Four FS scatter symbols landing at the same time in the base game.
What Happens
Four scatters open the upgraded pair. Legacy of Lightning keeps the Stormbreaker structure — three free spins, each a Thunder Respin — but guarantees at least 4 Coins and a Collector Chest every sequence and adds the Mjolnir symbol. A Mjolnir activates at the end of the spin and multiplies a random number of Coins on the grid by x2, x3, x4, x5, x10, x15 or x20, and the Chests only collect after it has done so. Hammer of the Heavens keeps The Wild Storm structure — ten spins, sticky Wilds, Wild God Reels — and lets Mjolnir add one of those same multiplier values to a random number of Wilds or expanded Wild God Reels for the current spin. Those boosted Wilds fall back to their own multiplier on the next spin.
Multipliers
Mjolnir adds x2, x3, x4, x5, x10, x15 or x20 — to Coins in Legacy of Lightning, to Wilds in Hammer of the Heavens.
Worth Knowing
Same trade as the three-scatter menu, one tier up. Legacy of Lightning is the dense, short option with guaranteed Coins; Hammer of the Heavens is the ten-spin build where Mjolnir lands on top of Wilds that are already multiplied.
| Trigger | 4 FS scatters |
| Legacy of Lightning | 3 spins, 4 Coins + 1 Chest each |
| Hammer of the Heavens | 10 spins, sticky Wilds |
| Mjolnir | x2 to x20 |
| Retrigger | +2 spins (2 FS), +4 spins (3 FS) |
Blessings of the Bifrost (Hidden Epic Bonus)
How to Trigger
Five FS scatter symbols landing at the same time in the base game.
What Happens
Hacksaw calls this one the Hidden Epic Bonus, and it is the only round with no menu attached — five scatters award it directly. It runs five free spins on the Legacy of Lightning rules, with at least 5 Coins, 1 Collector Chest and 1 Mjolnir symbol guaranteed in every Thunder Respin sequence. Two more Coins than Legacy of Lightning, two more spins, and a Mjolnir in every one of them.
Multipliers
Mjolnir multipliers of x2 to x20 on Coins, plus Collector Chest multipliers of x1 to x20 on the collected total.
Worth Knowing
There is nothing to decide and nothing to buy — this round only arrives on five scatters. It is the densest version of the respin math in the game.
| Trigger | 5 FS scatters |
| Spins | 5 |
| Guaranteed | 5 Coins, 1 Chest, 1 Mjolnir |
| Based on | Legacy of Lightning |
| Buyable | No |
Bonus Buys and FeatureSpins
How to Trigger
The BUY BONUS button, where the operator and the jurisdiction allow it.
What Happens
Heir of Thunder costs 100x the bet and drops you at the three-scatter menu, so you still choose between Stormbreaker and The Wild Storm. Mighty Mjolnir costs 200x and opens the four-scatter menu instead, with Legacy of Lightning and Hammer of the Heavens. Separately, FeatureSpins run until you switch them off and charge per spin: BONUSHUNT FeatureSpins at 3x a spin, and GODLY FeatureSpins at 50x a spin, a mode in which FS symbols cannot land at all. Hacksaw publishes an RTP for each: 96.29% for Heir of Thunder, 96.28% for Mighty Mjolnir, 96.28% for BONUSHUNT and 96.26% for GODLY.
Multipliers
Identical to a natural trigger — a bought round runs the same mechanics as the one you wait for.
Worth Knowing
The four RTP figures sit within 0.03% of each other and of the 96.27% base, so the choice is about how you want to spend, not about edge. Blessings of the Bifrost is not on the menu at any price.
| Heir of Thunder | 100x — 96.29% |
| Mighty Mjolnir | 200x — 96.28% |
| BONUSHUNT FeatureSpins | 3x per spin — 96.28% |
| GODLY FeatureSpins | 50x per spin — 96.26% |
| Hidden bonus | Not buyable |
Buy Feature Options
| Option | Cost | RTP | Risk |
|---|---|---|---|
| Heir of Thunder | 100x | 96.29% | High |
| Mighty Mjolnir | 200x | 96.28% | High |
| BONUSHUNT FeatureSpins | 3x per spin | 96.28% | Medium |
| GODLY FeatureSpins | 50x per spin | 96.26% | High |
Try the Features in Demo
Test the bonus mechanics for free — no registration needed. Get set up via the Stormborn step-by-step guide.
Play Free Demo