Thunderstruck II
What Is Thunderstruck II?
Thunderstruck II is a 5×3 Norse mythology video slot released by Microgaming in 2010. While the original Thunderstruck established the franchise in 2004, the sequel rewrote what a video slot could be — introducing a multi-tier progression system that inspired dozens of subsequent slots, including Immortal Romance.
The story draws from the Norse pantheon — Thor, god of thunder; Odin, the Allfather; Loki, the trickster; and the Valkyrie warrior. Each deity guards a different free spin mode inside the Great Hall of Spins, a bonus structure that rewards persistence with progressively more powerful features.
At 96.65% RTP — above the New Zealand casino average and, remarkably, above most slots released in 2026 — Thunderstruck II remains one of the most mathematically sound pokies available to Kiwi players. Its medium-high volatility and famous Wildstorm feature make it equally appealing for both bonus clearers and big-win chasers.
The Great Hall of Spins
Land 3 or more Thor’s Hammer Scatter symbols to enter Asgard’s legendary bonus hall. Four gods — four modes — each unlocked through repeated visits. The further you go, the more powerful the gift.
The entry point into the Great Hall. Valkyrie’s mode is available from the very first trigger — steady multipliers to get you started on your Norse journey.
Loki introduces Wild Magic — symbols randomly transform into higher-paying alternatives during free spins. The chaos his magic brings can dramatically elevate modest wins.
Odin’s ravens Huginn and Muninn bring Wild Multiplier magic. During free spins, ravens can randomly appear and apply 2× or 3× multipliers to existing wins — stacking with existing multipliers.
Wildstorm & Base Game Features
The Great Hall is the main event, but Thunderstruck II’s base game isn’t passive — the Wildstorm feature can erupt at any moment and rewrite any spin.
Substitutes for all symbols except the Scatter. Doubles all wins it completes — and five Wilds on a payline pay 1,000× the line bet. Appears on reels 1–5 during base game and free spins.
The gateway to the Great Hall. Land 3+ Thor’s Hammer symbols anywhere on the reels. Independent of paylines — 3 Hammers pay 5× total bet, 4 pay 40×, 5 pay 200× total bet. Free spins can retrigger infinitely.
Symbols & Paytable
Wins paid for 3, 4, or 5 matching symbols on adjacent reels from left to right. Wild doubles all wins it completes.
Substitutes for all symbols except Scatter. Every win completed with the Wild is automatically doubled (2×). Five Wilds on a payline = 1,000× line bet. During Wildstorm, covers 1–5 full reels.
Pays anywhere on the reels regardless of position. 3 Hammers = 5× total bet + Great Hall of Spins trigger. Free spins can retrigger unlimited times during any bonus mode — keep those hammers landing.
With 243 ways, there are no active/inactive paylines to manage — all 243 combinations are always in play. Wins are formed by 3, 4, or 5 matching symbols landing on consecutive reels starting from the left, in any row position. This removes the frustration of near-miss payline losses and gives every symbol position equal value.
RTP, Volatility & What to Expect
Thunderstruck II’s numbers tell a story worth knowing before you spin — especially if you’re using a welcome bonus to play.
RTP Comparison — Top NZ Pokies 2026
96.65%
At 96.65% RTP — above most 2026 NZ casino releases — Thunderstruck II is statistically one of the better choices for clearing the Spin Casino NZ welcome bonus. Every NZ$100 wagered returns ~NZ$96.65 on average, minimising the cost of meeting the 35× wagering requirement. Pokies contribute 100%.
Medium-High Volatility — What It Means for NZ Players
Thunderstruck II’s medium-high classification means base game wins appear more regularly than a pure high-volatility slot. Dry spells exist, but they’re shorter — you’ll see small and medium wins between feature triggers to sustain your session.
The biggest wins come from: (1) Wildstorm with 4–5 full wild reels, (2) Thor’s Rolling Reels cascades hitting the 5× multiplier trail. In both cases, wins above 500× stake are possible but require the right symbols in the right position.
The combination of 96.65% RTP + medium-high volatility + 100% wagering contribution makes this one of the most efficient pokies for clearing the Spin Casino NZ 35× welcome bonus requirement. Your balance is more stable than high-volatility alternatives.
How to Play Thunderstruck II at Spin Casino NZ
Create a free account, deposit NZ$10+ and claim your 100% welcome bonus. Thunderstruck II contributes 100% toward the 35× wagering requirement.
Find the game via the search bar or filter by Microgaming. Available on desktop and all mobile devices — same game, same features.
Set stake per spin using the +/− controls. While a bonus is active, do not exceed NZ$5 per spin to protect your bonus under Spin Casino’s max bet rule.
Hit Spin or activate Autoplay. Keep an eye out for the Wildstorm — the screen darkens before it fires. Every spin has a chance to trigger it.
Three Thor’s Hammer Scatters open the Great Hall of Spins. First visit: choose Valkyrie. Keep triggering to unlock Loki, Odin, and ultimately Thor’s Rolling Reels.
Why Play Thunderstruck II at Spin Casino NZ?
The game is available at multiple NZ casinos — here’s why Spin Casino is the preferred choice for Kiwi players specifically.
Spin Casino NZ’s 3-deposit welcome package gives you up to NZ$1,000 in bonus funds. Thunderstruck II’s 96.65% RTP and 100% wagering contribution make it ideal for clearing the 35× requirement.
Spin Casino holds a Malta Gaming Authority licence, and Thunderstruck II’s RNG is certified by eCOGRA. The Wildstorm fires randomly and without manipulation — every spin has a fair and equal chance.
The HTML5 remaster plays identically on iPhone and Android. The Wildstorm animation, Great Hall doors opening, and Rolling Reels cascades all render in full quality on mobile — no performance loss.
While playing Thunderstruck II, your 10 daily Mega Millionaire Wheel spins keep accumulating. Log in, play Thor’s games, spin the Wheel — two legendary bonus systems running simultaneously.
All bets and wins in New Zealand Dollars — no currency conversion fees. Withdrawals via Skrill process in ~4 hours; crypto in under 2 hours. NZ$0.30 per spin minimum means any budget is welcome.
| Feature | ⚡ Thunderstruck II | 💜 Immortal Romance |
|---|---|---|
| RTP | 96.65% | 96.86% |
| Volatility | Medium-High | High |
| Max Win | 2,400× | 12,150× |
| Base Game Frequency | More frequent wins | Longer dry spells |
| Best For | Bonus clearing, longer sessions | Big-win hunting, jackpots |
| Theme | Norse mythology / Storm | Gothic vampire romance |
Thunderstruck II — FAQ
Everything NZ players ask about this Microgaming classic.
