Monthly
To play for free in demo mode, just load the game and press the ‘Spin’ button. You can learn more about slot machines and how they work in our online slots guide.
Charles Perrin
Game Analyst
Dr Zappo drops players into a wacky world full of scientific oddities.
Developed by Hacksaw Gaming, the game centers around a doctor, an eccentric genius, who tries to transform the fortunes of an entire city with his mad experiments.
Leaning heavily into the mad scientist theme, Dr Zappo may capture the attention of players.
The music for Dr Zappo is subdued and not in keeping with the whimsical nature of this title.
A double bass is used, and there are indistinct chattering noises in the background that resemble being in a jazz bar.
There is a touch of craziness added to the cartoonish visuals supplied by Hacksaw Gaming, where eyeballs are scattered all over the street.
It evokes memories of the popular TV show Rick and Morty, and buildings are adorned with emblems depicting spherical shapes.
Overall, the unusual soundtrack and vibrant graphics fuse nicely in Dr Zappo.
Dr Zappo plays out on a 5x4 grid, and there are 14 fixed paylines attached.
Wins are scored by landing at least 3 matching symbols across consecutive reels from left to right.
The robot and Dr Zappo are among the premium symbols in this game, offering payouts ranging from 6x to 10x your bet for securing a 5-of-a-kind combination.
The EyeBall Wild is the driving force behind Dr Zappo. It can only land on the bottom row of the grid, and once it lands, it can shoot off in one of three directions – up, diagonally left, or diagonally right. When an EyeBall shoots, it can transform paying symbols into Wilds. The multiplier values range from 2x to 200x.
When an EyeBall shoots one of the Energy Fields straight on, it bounces back and continues in the reverse direction rather than stopping dead. This can convert symbols on the way, and if an EyeBall hits an existing Wild or EyeBall, it will add a multiplier value to those symbols.
Landing 3, 4, or 5 Scatters can trigger one of three Free Spins bonus modes, and they are built around making the EyeBall more active:
This game has a maximum win ceiling of 10,000x your bet.
The Return to Player (RTP) rate for this game is 96.31%. Although a theoretical figure, high RTP games imply a higher average return on bets placed in the long term.
The minimum bet permitted is $/£/€0.10 per spin, while the limit is set at $/£/€100.
This game is classified as medium volatility, making wins more evenly balanced. Our slot machine strategies, however, favor highly volatile titles, where players can claim big wins, albeit less frequently.
Dr Zappo is a bizarre, if not inherently funny, science-themed slot.
Hacksaw Gaming has perfected the mixture of Wilds and multipliers to keep things entertaining, and this adds weight to every spin.
However, this title loses some marks for its medium-volatility rating, so we're not in a rush to recommend it.
Discuss anything related to Dr Zappo with other players, share your opinion, or get answers to your questions.
Free professional educational courses for online casino employees aimed at industry best practices, improving player experience, and fair approach to gambling.
An initiative we launched with the goal to create a global self-exclusion system, which will allow vulnerable players to block their access to all online gambling opportunities.
You will soon be redirected to the casino’s website. Please wait. If you use some ad blocking software, please check its settings.
