Editorial note: this is a general guide to how Thor’s Lightning works. Slot rules, feature availability and RTP can vary between operators and game versions, so always check the in-game information panel before you spin. Slots are games of chance — nothing here is a prediction of results, and no strategy changes the odds.
Thor’s Lightning slot review
Thor’s Lightning is a Red Tiger slot released in February 2019, the studio’s first game built portrait-first for mobile. It uses a 7x7 grid where clusters of five or more matching symbols pay. A 3x3 block of locked tiles in the middle is the target: break all nine in one round and Valhalla or Muspell free spins begin.
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How Thor’s Lightning plays
Any touching group of five or more pays, then vanishes as an avalanche drops new symbols in, which can link into another cluster in the same spin. A wild fills in for regular symbols. A win next to one of the nine locked tiles cracks it open, so the centre gives way as the chain goes on.
Thor himself can step in at random during a spin:
- Lightning Strike: clears the lower-value symbols, or turns a random set of symbols into one matching type, which can include wilds.
- Hammer Strike: the hammer lands on the grid to nudge a symbol or remove one, which can open up a new cluster.
Valhalla Spins and Muspell Spins
There is no scatter. The bonus comes only from unlocking all nine central tiles inside one round, with cascades counting.
Valhalla Spins leave only blanks and golden shields. Shields lock in place and flip at the end to show stake multipliers, which are added together. Muspell Spins keep cluster pays but remove the low-value symbols. Lava Shower can wipe out a symbol type for a respin, and Lava Flow places matching symbols on connected reels to build a win.
That split between a shield round and a cascading round gives it its own character among Norse grid slots.
Game information
| Provider | Red Tiger |
|---|---|
| Released | February 2019 |
| Reels and pays | 7x7 grid, cluster pays (five or more matching symbols) |
| RTP | Shown in the game’s information panel |
| Stake per spin (UK) | From 20p. UK stakes are capped at £5 a spin (£2 for players aged 18 to 24) |
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Find Thor’s Lightning in the Fortune Games lobby (18+). You can also browse our slot game guides.
All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.
Frequently asked questions
How do I unlock the free spins?
Break all nine locked centre tiles within one round; wins next to a tile crack it.
What is the difference between Valhalla and Muspell?
Valhalla collects shields that reveal stake multipliers, while Muspell keeps cluster wins with higher symbols and lava features.
What can Thor do in the base game?
At random he can call a Lightning Strike to clear or transform symbols, or a Hammer Strike to nudge or remove one.
What is the RTP?
The game’s information panel shows it. RTP can differ between operators and game versions, so check the panel in the version you play.
Related guides
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