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Robo Jack slot from Microgaming

Robo Jack slot from MicrogamingThere can never be enough robot-content slots in the universe. That’s the motto the developers at Microgaming live by, and they put their words into action in 2014 by releasing the Robo Jack slot machine, a quirky little slot featuring six retro robots. The silly sped-up electro-pop music, including beeps and buzzes, set the tone for the slot, but once you realize the max win is 90 000 coins (1200x the total bet), it’s not so casual anymore. No matter how cartoonish the robots look and the entire design, for that matter, this slot is designed to be entertaining first and profitable second; as soon as the Free Spins kick in, the retro-Robo-fun truly begins. We advise you to try the Thunderstruck Wild Lightning slot by Microgaming for free.

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Choose 1 of the 5 Robots, and it will show its unique set of extraordinary and lucrative powers, including generating Wild Reels, Multipliers, Scatter Prizes, and Extra Wilds. Enough to make your brain short circuit when you start adding up all your payouts. This Medium Volatility slot has a relatively low RTP of 94.26% but offers enough fun and hilarity to make up for that.

Try out the Robo Jack machine for free in the DEMO version on this page. No registration is required.

Personal testers’ opinion

We’re not into retro robots ourselves, but we do see how this theme can be captivating for a certain audience. Robo Jack is built with a decent paytable where the values for the regular symbols are between 4 and 42x the total bet for 5OAK, but 83x the total bet for 5 Wilds, and the habitual 100x the stake for the Scatters (i.e. adequate enough numbers not to label this paytable as cheap). What is astonishing with this energized, full of hyper-active humanoids online slot is not just the huge number of bonus spins you can receive but the opportunity for a re-trigger and the alternative for a second pick of the bonus mode (if you don't like the 1st given prospect). At least it seems that you have a little bit of control over the sort of bonus round.

During the main game, oftentimes, you can receive 5OAK or other combinations in the value range of 20-30x the total bet. Still not enough to keep the balance steady, so - not suitable for completing the wagering requirements. Moreover, the waiting for the bonus round is lengthy (the Free Spins are triggered approximately after 177 spins), i.e. be prepared with sufficient starting capital. The hit probability is average near 30%, while the division of the prize pool is around 73/27% in favour of the base game. The frantic tempo can become annoying after a while and the gameplay - repetitively agitating too.

All closely considered, we leave neutral recommendations for playing with real credits at the Robo Jack slot machine, mainly because of the poor RTP and the decline trendiness in the rank at most of the casinos (i.e. not full prize pool).

Hidden parameters for Robo Jack online slot (data from testing)

  • The frequency of triggering the bonus is statistically every 177th spins (0.56%).
  • The probability of a hit (any winnings) is 29.79%.
  • The distribution of winnings is equal to 73% in the usual spins and 27% in the bonus feature.
  • The maximum winning during the tests was 213x.
  • The medium winning from the bonus was 45x.
  • Volatility - 5.62 out of 20 (average).
  • Cycle length is average.
  • The rating of the slot machine for the wagering is 5,68 out of 10.
  • The RTP of 94.26% does not allow getting a positive mathematical expectation of winning at the casino.


  • Wild Robo Jack Logo - paid just acceptably while also replacing all other symbols other than Free Spins Scatters.
  • Free Spins - Landing 3+ Free Spins Scatters will initiate the highlight of this slot. You are awarded 1 of 5 Robos which is designated to show you its special Free Spins powers. If you’re not completely with the 1 you are awarded, you get 1 more chance. It might be more to your liking or not, but you don’t have a say in this choice. On the upside, Free Spins can be re-triggered.
  • Orange Robo - 12 to 60 FS with Extra Wilds
  • Purple Robo - 12 to 40 FS with Scattered Cash prizes
  • Light Green Robo - 4 to 20 FS with 1 full Wild Reel per spin
  • Pink Robo - 10 to 65 FS with possibility for 2 Scatters awarding 8 additional spins
  • Dark Green Robo - 10 to 50 FS where all wins will be tripled


  • Number of reels - 5
  • The pay lines are 243
  • The value of one coin is from 0.01 to 0.25
  • The number of coins per line is from 1 to10
  • The diapason of the bet sizes is from 0.30 to 75
  • The maximum winning is 90 000 coins.
  • Wild symbol - yes
  • Scatter - yes
  • Free spins - yes (with the several additional features)
  • Bonus game - no
  • The progressive jackpot - not played

Where to play?

  • Play Robo Jack slot at the best gambling site in Canada - Fastpay Casino. They offer over 5300 casino slot games as well as instant and no-hassle payouts. After the first deposit, you will become part of their VIP bonus program for loyal players with 11 levels. Each level will bring new and outstanding prizes for you.

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Written by Kamen Valev
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