Online slots' bonus games

Thursday, July 25, 2019

There are many online slots with interesting bonus games both on additional screens, and on the reels of slot machines. We choose the most interesting bonus games to publish their reviews on SlotsBook.

Some slots players search bonus games on the reels, but probably you search bonus games on the second screen. Our review of bonus game is the description of process of bonus game and view the large screenshot of this bonus game.

Now look the list of available reviews below. Choose to read.


  • Hit three or more Camera symbols and you will be in one step from photohunting. It's Wild Safari bonus game on the second screen which will give you an additional win in bonus coins.


collapsing reels

  • Power Spins feature on Nuclear 9's slot has Rolling Reels feature where winning symbols will be replaced to make new combinations.
  • This Collapsing Reels feature creates new combinations during play on The Mummy Slot, exploding symbols in winning combinations explosions.

dice board

expanding wild

extra bet

  • Power Spins on Atomic 8's slot can be played only with extra bet. During power spins feature the wins pay combinations left-to-right and right-to-left.

extra scatter

extra wild

free spins

  • Starring team Tim Karat, Lisa Lode and Fool's Gold wait you in Goldenman slot game, where you can win 15 free spins.
  • Player is awarded 10 free spins on Jekyll and Hyde slot if you hit 3 scatter symbols.
  • You can win up to 75 free spins on Wild Safari slot game.
  • Stacked, Expanding and Traling wild symbols are additional feature during 25 free spins on Santa's Wild Ride slot. Also all wins are doubled during this game.
  • 15 free spins is a bonus feature on Dark City Slot
  • Win fifteen free spins in the Free Spins bonus game. All wins during the free spins are doubled.
  • You can win 8 free spins if you collect four bananas to the reel's basket in Banana Monkey Slots.

free spins + sticky wild

  • It's unique bonus game which offers five free spins plus additional 'super spin' with sticky wild symbols.




lotto progressive sidegame

match multiplier


multilevel pick a box

  • We invite you to tea party to increase your wins! It's multi-level bonus game on Alaxe in Zombieland online slot.
  • Hit three magnifier on It's a Mystery Slots to win Portrait Puzzle Feature

multilevel pick until collect

multilevel pick until pop

  • Pick a chocolate to win coins!
  • It's a main bonus feature on the Mummy Slot. It's triggered randomly and activate other bonus features. Also you can win cash during Lost City Adventure Bonus.
  • 2,400 coins is possible prize in bonus game. Play three levels to win it. If you find a POP symbol the game over.

multilevel pick until stop

  • Red Queens is a prize of the last level on Red Queens Adventure Feature. It's not simple to win! The big good luck is necessary.
  • Shoot the blue spiders to win up to 40 free spins. Shoot the orange spiders to win multiplier value up to 6x. Shoot the big spider and door cranks to win bonus amount up to 9000 coins. You will find all this in Arctic Fortune Bonus Game.

multilevel pick X of Y

multilevel wheel of fortune


paid respin

pick a box

pick a box - free spins

pick until collect

pick until match bonus

pick until pop

pick until stop

pick x of y

  • Pick a treat to dunk in chocolate and win coins.
  • Find the Birdie with Birdwatcher to win coins in bonus game on the second screen.
  • The superhero the Goldenman battles against an enemy squadron. Each brought down plane gives you a prize during pick x of y bonus.



respins + sticky wild


scratch and match

  • The clothing disappears from the beautiful sexy alien and you win up to 12,000 coins in the Sneak-a-Peek Bonus Game.

slot game

stacked wild

sticky wild

stop and win

wheel of fortune

  • This game offers four-level progressive jackpot: Mithril Progressive, Gold Progressive, Silver Progressive, Bronze Progressive. Spin a wheel fortune to win one of them.

wild, multiplier