Thunder Screech

Unfinished Games

RTP: 96.20%

If your game round is disrupted, all game information and placed bets are stored until you re-open the game. You may continue your unfinished round from the point of interruption. Unresolved bets placed but remaining undecided in incomplete games will become void after 15 days. Malfunction voids all pays and plays.


Payline wins occur on the number of selected paylines, according to the information in the paytable and game rules. When winning on multiple paylines in a single game round, all winnings are added together. All winnings from Features (such as Free Spins), Bonus Games and/or Scatters (if applicable) are also added to payline wins. All winning combinations are paid out at the end of a game round. Free Spin features are played with the same bet and same number of selected lines as the game round that triggered the feature – unless otherwise stated. The bet cannot be changed during a currently running game round. Please refer to the game rules for more information.

Game Rules

Thunder Screech is a 5-reel video slot machine with 10 fixed paylines.

Wild symbols substitute for all symbols (except Scatter) and only appear on reels 2, 3, and 4.

The Call feature is activated randomly and adds 5 – 9 Wild symbols. Wins calculated after the effect.

The Strike feature is activated randomly, upgrading all Wild symbols to Thunder Wild symbols. Thunder Wild symbols substitute for all symbols (except Scatter) and only appear on reels 2, 3, and 4. Additionally, the symbol triggers re-spins when landing and is sticky until its multiplier reaches x3. The symbol multiplier always starts at x0, increasing between each re-spin. When multiple Thunder Wild are present on a payline, the multipliers are added together for a maximum multiplier of x9. Feature ends when no Thunder Wild symbol is present.

Scatter symbol on reels 1, 3, and 5 trigger 5 Free Spins. Wild symbols are upgraded to Thunder Wild. During free spins only, at least 1 Thunder Wild is guaranteed to land. Thunder Wild symbols behave as per Strike feature, except that no re-spins are awarded until the free spins are over. Once all free spins have been consumed, the game continues via re-spins until no Thunder Wild symbol is present (additional re-spins can now be awarded again). Additional Free Spins cannot be won.

Scatter symbols are not present during Call, Strike and Free Spins features. The Call and Strike features cannot be triggered simultaneously.

Bets are selected using the bet buttons. Click the plus and minus buttons to change the bet one step at a time. To start the round, click SPIN. When the reels stop, the symbols displayed determine your prize according to the paytable.


  • Paytable- Toggles the display of the paytable.
  • Auto Play- Click the AUTO PLAY button to enable/disable the Auto Play feature. In Auto Play mode, a number of consecutive game rounds are initiated automatically using your current bet settings. The Auto Play mode is automatically disabled depending on your settings or if your balance becomes too low.
  • Hyper Spin- Pressing and holding down the SPACE button activates Hyper Spin mode after 1.5 seconds. The spins speed up immensely but slow down if a feature is activated.
  • Spin- Starts the round by spinning the reels.
  • Stop- Stops the reels more quickly.
  • Fast Play- Toggle on for a significantly faster gameplay.

The maximum win from a single game is £250,000

Last modification date: 2/11/2021