Microgaming LogoLaunched in 2003, Thunderstruck was the first online slot machine to have a free spin feature like Queen of the Nile.

According to industry data the game is still the most popular choice all of these years later. The game uses the common nine line format and features a top jackpot of 10,000 coins which is multiplied by the amount of coins bet per line.

On the free games it is possible to win up to 150,000 coins in a single spin - up to $150,000 at the $1 coin size. Thunderstruck is a nine line game with a max bet of 45 coins (5 coins per line). It comes in coin sizes ranging from $0.01 to $1. Some casinos have a $2 version.

The Thor symbol is wild and substitutes for all symbols except scatters. It also doubles any win it is a part of. Five Thors pays the top jackpot of 10,000 coins.

The rams are scattered and are the key to the free spins. Three or more scattered rams activates 15 free games with all wins tripled. The free spins can be re-triggered.

The game also has a double up option like the Australian style slots. You can double with red or black or quadruple with the suits. After playing this game for only a few minutes we can see why it is so popular. It's pretty much Queen of the Nile online.

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