Thunderstruck II — slot review
Thunderstruck II is a slot by Microgaming / Games Global (released 2010) with an RTP of 96.65%, medium volatility. Theme: Norse mythology.
Free demo
Free, virtual chips only — no sign-up
Demo mode uses a virtual balance and pays no real winnings. It is meant for getting familiar with the game.
Specifications
| Provider | Microgaming / Games Global |
| Release year | 2010 |
| RTP | 96.65% |
| Volatility | Medium volatility |
| Reels | 5x3 |
| Paylines | 243 ways |
| Theme | Norse mythology |
| Mechanics | 243 ways, free spins, multipliers, wildstorm, rolling reels |
Why the RTP at a casino may differ
Providers ship the same game in several return configurations, and each casino picks which version it runs. Across the market the spread typically runs 2–8 percentage points below the headline figure. The number here is the provider specification — the version actually running is shown inside the game, in its rules screen.
Thunderstruck II review
The sequel to the Thor classic that raised the bar for the entire industry back in 2010. At the heart of the slot is the Great Hall of Spins, offering four free-spin modes: Valkyrie with a x5 multiplier, Loki with wild magic symbols, Odin with ravens that turn symbols into stacked wilds, and Thor with rolling reels and multipliers up to x5. The modes unlock as you retrigger the bonus, which keeps you coming back. The random Wildstorm feature can blanket up to five reels with wilds at once. This is a slot for the patient: its full potential only reveals itself over the long run, but the sense of progression feels like a genuine adventure.
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See also
This review was prepared by the Casino Atlas editorial team. Last updated: July 2026. Specs are based on provider data; the RTP version may differ at a specific casino.