Play Blueprint Gaming’s Thundercats online slot game here at Slot Boss and you could be in for thunderous wins. Thundercats is packed with bonus games, wild symbols and it features the original Thundercats characters.

Base Game

Thundercats slot game is played on a 5 reel slot and features 30 paylines.


Total Bet

You can increase and decrease the total bet amount by selecting from the list of stakes that are available in the total bets options.


To start the game and spin the reels click on the spin button. Be sure to choose your bet before clicking on the spin button.


Thundercats also has an autoplay feature, whereby the reels will spin automatically for a predetermined number of spins at your chosen bet level.


To view the help page then click on the Help button. This page includes information on gameplay and bonuses.

Thundercats’ Free Spins Bonus Features

Thunder Bonus

You can trigger the Thunder Bonus by landing three or more bonus symbols in Thundercats. You will then be presented with the Thunder Wheel. You will have to spin the reel in order to decide which free spins bonus feature you will activate. You can either choose the bonus you land on or you can gamble it for the chance to win the next bonus up.

Ultimate Thunder Spins

If you land on the Ultimate Thunder Spins on the bonus wheel feature, then Ultimate Thunder Spins will be activated. You can also trigger this Ultimate Thunder Spins bonus feature by gambling up to it. You will be awarded five win spins and stacked wilds will be active on the reels.

Mumm-ra Free Spins

The Mumm-ra Free Spin is activated if you land on the Mumm-ra free spins segment in the bonus wheel, or if you gamble up to it. You will be awarded ten free spins and all wilds that are in view on the reels will be added to the Mumm-ra bank. Once you have played through all of the free spins, the Ever Living Spin feature will be initiated. This will result on all of the wild symbols collected in the Mumm-ra bank being placed back on 8 high reels. Any additional wilds that land on the reel during the Ever Living Spin feature are also added. There will be a wheel spin at the end of the feature and you have the possibility to retrigger the Ever Living Spin feature. To collect all winnings click the select button at the end of the bonus feature.

Slithe Free Spins

Gambling up to the Slithe free spins bonus feature or landing on it during the bonus wheel will trigger the Slithe free spins bonus in Thundercats. You will be awarded ten free spins and you will play them with sticky wilds. You can trigger an additional five free spins if an entire stack of sticky wilds appear on the reels. This bonus feature will come to an end once you have used all of your free spins.

Monkian Free Spins

Monkian free spins will be triggered if you land on the segment during the bonus wheel or if you gamble up to it throughout Thundercats. You will be awarded ten free spins which will be played with Monkian Zones, these fall from the top of the screen and transition into wild symbols when they land on the reels. You can win up to five additional free spins if the Thundercats slot symbol appears on the fifth reel. Once you have exceeded your number of free spins the bonus Monkian free spins will come to an end and you will return to the Thundercats base game.

Jackalman Free Spins

If you land on the Jackalman Free Spins segment on the bonus wheel or by gambling up to it, then the Jackalman Free Spins bonus feature will be activated. You will be awarded ten free spins which will have mad Jackal multipliers and each wild which is in view on the reels will increase the multiplier up to 10x. If the Thundercats symbol lands on reels five then the Jackalman free spins feature can be retriggered, with up to 5 additional free spins being added. Once you have played all your free spins and exceeded the number of free spins then the bonus feature will come to an end.


When the special symbol lands in reel five, the special bonus wheel will be activated. This will spin and land on a character, you can either choose to activate that character or respin. Each character has different benefits, which are described below:


Activating Lion-O will result in his Sword of Omens in reel three expanding and triggering random wild symbols.


Activating this character will see any wilds which land on the reels paying the win and they will then transform into stacked mystery symbols.


Activating Cheetara will result in a mystery streak which is activated when a special Cheetara wild symbol lands on reel one. Any new wilds which land on the reels will expand the reels.


Panthro reels will become active and reels can link with super stacked symbols during any spin. During Panthro reels, the reels can expand randomly.

Wily Cat

If Wily Cat is activated then two stacked wilds can be triggered on any spin and all wins are multiplied by 2x.


Snarf can appear in any character and it can result in losses being transformed into wins, it can also improve the bonus modifier if one is active at the time. In addition, Snarf can increase the amount of bonus symbols there are on the reels, increasing your chance of triggering the Thunder Bonus.

Thunder Reels

Thunder Reels can be activated during any spin of the reels in Thundercats and it will result in the reels expanding up to 8 rows high.