Hammerstorm (Pragmatic Play) – Slot Review
Hammerstorm by Pragmatic Play adopts a bold Norse-mythology-inspired theme, immersing players in a world of thunder gods, ancient weapons, and electrifying celestial power. The game draws heavily from Viking legend, particularly the imagery associated with Thor and his mythic hammer, Mjölnir.
The backdrop and overall atmosphere capture a realm charged with storm energy — crackling lightning, dark skies, rune-etched stone, and a heroic sense of danger. The symbols reinforce this mythic tone: shields, axes, helmets, and war gear define the premium set, while special symbols like Lightning icons, Coins, and the Thor symbol tie directly into the theme’s supernatural storm mechanics.
Hammerstorm is a high-volatility slot played on a 5×3 grid with 40 fixed paylines, offering a 96.50% RTP and a maximum win potential of 10,000x. Stakes range from £0.20 to £240 per spin.
Hammerstorm Symbols & Pay Table
The game features 14 symbols, beginning with J, Q, K and A as the low pays. Premium symbols include Horns, Gloves, Helmets, Axes, and Shields — with the Shield as the top payer, awarding 1.75x for five of a kind. Special symbols enrich the gameplay further: the Hammer Wild, three types of Lightning symbols (Red, Green, Purple), the Thor symbol, and Coin Money symbols in silver and gold variations. Wilds appear on all reels and substitute for all standard symbols.
Hammerstorm Features & Mechanics
Lightning Symbols & Base Game Collections
During the base game, Red, Green, and Purple Lightning symbols can land on the reels. Each colour corresponds to a chest above the grid — DOUBLE, EXPAND, or SPINS. When Lightning symbols land, they are collected into their respective chests, and may randomly trigger a Respins feature enhanced by one, two, or all three modifiers.
In addition, each Lightning symbol acts as a Money symbol, awarding a random value from a broad range: 0.5x up to 10,000x total bet.
The Thor symbol, which appears exclusively on reel 1, guarantees the Respins feature when it lands alongside at least one Lightning symbol.
Respins Feature
The Respins round begins with 5 respins and shifts to a 5×5 grid containing only Coin Money symbols, Lightning Money symbols, and blanks. Coin and Lightning symbols can reveal values ranging from 0.5x to 10,000x, with gold versions appearing only when the DOUBLE modifier is active.
A marked 2×2 collection zone is present on every respin. Before the round starts, the values of any Lightning symbols that triggered the feature are automatically collected by this zone. After each respin, the zone moves to a random position.
Whenever a Coin or Lightning Money symbol lands within the zone, its value is collected. Lightning symbols also accumulate in a meter. As more are collected, the collection zone expands:
After collecting 5 Lightning symbols, the zone becomes 3×3 and +3 respins are awarded.
- After 4 more, the zone expands to 4×4 with +2 respins.
- After 3 more, it grows to 5×5 and grants +1 respin.
The feature ends when no respins remain.
Modifiers
Depending on how the feature was triggered, one or more modifiers may be active:
DOUBLE – Gold versions of Coin and Lightning symbols can appear. Collecting a gold symbol awards its value twice: once at its displayed value, and once again with a freshly rolled value.
EXPAND – The respins round is played on a 7×7 grid instead of 5×5. The marked zone can grow beyond 5×5 to 6×5, 6×6, and 7×6 by collecting additional Lightning symbols, awarding extra respins with each expansion.
SPINS – Lightning symbols gain the ability to reveal +1 Spin, adding extra respins during the feature.
Ante Bet Options
Players may enhance gameplay via three Ante Bet modes:
Bet Multiplier 50x – Guarantees at least five Lightning Money symbols on every spin.
Bet Multiplier 25x – Guarantees a Thor symbol on reel 1 during every spin.
Conclusion
Hammerstorm delivers a bold and energetic take on Norse-inspired gameplay, pairing Pragmatic Play’s polished visuals with a feature set that feels both powerful and highly volatile. The Lightning collections, expanding respins grid, and trio of modifiers add real excitement, creating moments where the screen can explode with potential. Be sure to try out this game on launch and check out our exclusive casino offers.