How is the Hammerstorm Respins feature triggered?

Each collected Lightning Symbol has a random chance to trigger Respins. The feature is guaranteed when Thor lands on reel one together with at least one Lightning Symbol elsewhere.

How many respins are awarded initially?

The Hammerstorm feature begins with five respins.

Which symbols can appear during Respins?

Only Coin Symbols, coloured Lightning Symbols and blank positions can appear.

How does the collection zone work?

Only Coin and Lightning Symbols landing inside the highlighted collection zone award their cash values.

How does the collection zone expand?

Collecting five Lightning Symbols expands it to 3 by 3, four more expand it to 4 by 4 and another three expand it to 5 by 5.

How many extra respins are awarded through zone upgrades?

The three standard upgrades award three, two and one additional respins respectively.

What does the Double modifier do?

It introduces golden Coin and Lightning Symbols that are collected once at their original value and again with a newly generated value.

What changes when the Expand modifier is active?

The Respins grid increases from 5 by 5 to 7 by 7 and the collection zone can expand beyond its normal maximum size.

How does the Spins modifier extend the feature?

Lightning Symbols can display a plus one spin award, adding another respin when collected inside the active zone.

Where can I play Hammerstorm for free?

You can play the Hammerstorm demo for free on SpinGang without registration.

Hammerstorm

Name: Hammerstorm
Author: Pragmatic Play

Hammerstorm by Pragmatic Play abandons the usual Free Spins formula in favour of a mobile collection zone that controls which cash prizes are actually awarded. Lightning Symbols gathered during the base game can randomly summon a five respin feature with up to three active modifiers, while Thor provides a guaranteed route into the same round. Once inside, the collection area moves after every respin and gradually expands as more lightning is captured. Hammerstorm is played on five reels and three rows with 40 fixed paylines. Regular wins are formed by landing matching symbols on consecutive reels from left to right, beginning with reel one. The paytable combines card ranks with Viking equipment such as drinking horns, gloves, helmets, axes and shields. The hammer is the Wild symbol and can appear across the base game reels. The Wild substitutes for regular paying symbols to help complete line combinations. It does not replace Thor, Coin Symbols or the coloured Lightning Symbols connected to the main feature. Red, green and purple Lightning Symbols can appear during the base game. Each colour is linked to one of the three chests displayed above the reels. Red Lightning is collected in the Double chest, green Lightning feeds the Expand chest and purple Lightning contributes to the Spins chest. Collecting one of these symbols does not guarantee that its corresponding modifier will become active. Each collected Lightning Symbol has a random chance to trigger the Respins feature, potentially with one, two or all three modifiers enabled. Lightning Symbols also carry individual cash values. Possible prizes range from 0.5x to 10000x the total stake. The Thor Symbol provides the guaranteed trigger. Thor appears only on reel one, and landing him together with at least one Lightning Symbol anywhere else on the grid immediately activates Respins. The feature begins with five respins and replaces the standard reels with a 5 by 5 grid. Only Coin Symbols, Lightning Symbols and blank positions can appear. Both Coins and Lightning Symbols can carry cash values ranging from 0.5x to 10000x. These prizes are not awarded simply because they appear on the grid. A 2 by 2 collection zone is placed at a random location before each respin. Only Coin and Lightning Symbols landing inside that highlighted area are collected. The zone changes position between respins, so a symbol landing outside it contributes nothing unless another mechanic specifically affects that result. Lightning Symbols collected inside the active area have two functions. Their displayed cash prizes are awarded, and each symbol also contributes towards the progression requirements that expand the collection zone. The first upgrade requires five collected Lightning Symbols. Reaching this target expands the zone from 2 by 2 to 3 by 3 and awards three additional respins. Four more Lightning Symbols are then required for the second upgrade. The collection zone grows to 4 by 4 and two additional respins are added. The final standard upgrade requires another three Lightning Symbols. This expands the active area to 5 by 5 and provides one extra respin. A fully upgraded standard collection zone covers the entire 5 by 5 grid. Every Coin or Lightning value appearing from that point can therefore be collected. The respin counter does not reset whenever a cash symbol lands. Extra rounds are gained by completing Lightning collection targets or through the Spins modifier. The Double modifier introduces golden versions of Coin and Lightning Symbols. When a golden symbol lands inside the active zone, it is collected twice. Its first collection awards the value initially displayed. The symbol then receives a newly generated value, which is collected as an additional prize. The Expand modifier enlarges the feature grid from 5 by 5 to 7 by 7. The collection area can continue growing beyond its normal dimensions as further Lightning targets are completed. This creates more available positions for Coin and Lightning Symbols, but it also means the collection zone must progress further before it can cover most of the expanded grid. The Spins modifier adds special extra spin possibilities to the Lightning Symbols. A qualifying Lightning Symbol can display a plus one spin award instead of an ordinary cash value, immediately adding one respin to the remaining total when collected. Several modifiers can operate during the same feature. Golden symbols can therefore appear on the expanded grid while plus one spin results extend the round. The strongest version activates Double, Expand and Spins together. This provides the largest grid, access to double collections and additional opportunities to increase the respin counter. Hammerstorm does not contain Scatters or a traditional Free Spins feature. Its complete bonus potential is concentrated in the moving collection zone and its three possible modifiers. The game also does not offer a conventional Bonus Buy. Supported versions may instead include enhanced stake options. One option costs 25x the normal stake and guarantees that Thor lands on reel one. Since the feature still requires a Lightning Symbol alongside him, the trigger is not guaranteed on every paid round. Another option costs 50x the standard stake and guarantees at least five Lightning Symbols on the initial result, creating a heavily boosted opportunity to activate Respins. Hammerstorm has a default RTP of 96.50 percent. Lower RTP configurations may be selected by individual casinos. The volatility is high and the maximum win is 10000x the stake. Reaching the payout limit ends the active round and awards the capped amount. The visual setting presents a peaceful Viking settlement surrounded by mountains, water and distant golden halls. That calm scenery contrasts sharply with the feature, where electric symbols, moving highlighted areas and repeated grid expansions make each respin increasingly intense. Hammerstorm is at its best when several systems begin supporting one another. Lightning Symbols increase the size of the collection area, the Spins modifier creates more time to complete each target, Double adds a second prize to golden symbols and Expand provides a much larger grid to explore. The moving zone prevents every cash value from being automatically useful, giving positioning and progression a genuine role in a feature capable of producing prizes up to 10000x.