This is the third, final part of the series of Star Trek slots developed by WMS. The game is inspired by episode 13 season 2, in which Enterprise encounters an unknown life form of cute furry creatures that breed like rabbits and soon occupy every compartment and food storage tank in the starship, thus turning the life of crew members into a disaster. To be able to play the slot, you need first to launch Part I slot called Star Trek: Red Alert, earn 50 medals to unlock Part II named Explore New Worlds, and then earn 50 more medals to unlock this reviewed slot. The Trouble with Tribbles is currently the final slot in the Star Trek range, though you can still earn medals, which may serve as testimony to WMS’s plans of releasing a continuation to the three already developed slots.

The Trouble with Tribbles is played over 25 fixed paylines, each accepting $0.01 to $3. Besides, a forced side bet is automatically added to the main payline bet, making the total bet bigger. If, for example, you choose to play at max and make a three-dollar wager, the obligatory side bet will be $30; therefore, your total spin bet will be equal to $105 ($75 + $30). The highest monetary award up for grabs is $4500; this is granted for hitting five Insignia symbols on a payline.

Bonus features

Any winning spin can result in triggering one of the four bonus features – just in the same way as other Star Trek games by WMS. However, the Rock Creature bonus offered in Red Alert and Explore New Worlds is replaced with the Kirks Gone Wild bonus. The randomly activated features are as follows:

• Scotty’s Wild Reel. One or two reels will become fully wild
• Spock Multiplier. Spock will show his signature Vulkan salute and give you a multiplier of x3 to x10 to be applied to your latest winning amount
• Kirks Gone Wild. A green alien will transform all Kirk symbols visible on the reels into Kirk Wilds
• Enterprise Fly-By. All symbols that have created paytable combinations in the current spin will turn into a single high-paying symbol.

Three Feature symbols scattered on the reels activate the Tribble Pinball bonus that simulates a pinball game with Tribbles instead of a normal ball. In this feature you earn cash prizes that depend on which tube located at the bottom the Tribble falls into. Besides, you can advance to level 2 ‘Door Feature’ and then resume playing Tribble Pinball.