Quick answer
Zap Attack! is a Thunderkick slot (2023) with 96.15% RTP, high volatility and a 5,000x max win. It uses 25 paylines with expanding wilds, multipliers and symbol upgrades. An official free demo is available. RTP can vary by casino.
Key specs
- RTP
- 96.15%
- Volatility
- High
- Max win
- 5,000x
- Grid
- 5×5
- Pays
- 25 paylines
- Released
- 1 September 2023
- Jackpot
- None
Not published by the provider: bet range
Casinos with Thunderkick games
- Opalis125% up to $750 + 125 Free Spins35x bonusCarries ThunderkickPlay at Opalis (opens in new tab)
18+. New customers. Min dep $20. 35x bonus wagering. Max bet $5. 21 days. 125 spins on Sweet Bonanza at $0.20. Full T&Cs apply.
Key terms
18+. New customers only. Min deposit $20. 35x bonus wagering requirement. Max bet $5 while wagering. Free spins on Sweet Bonanza at $0.20 per spin. Offer valid 21 days. Full T&Cs apply. Please gamble responsibly.
Check Zap Attack! is in the lobby in your country.
Themes:
Free demo Members
Try Zap Attack! with play money before deciding whether to play for real. Official Thunderkick demos are free for GambGenius members.
How to play Zap Attack! (members only)
Wins are paid when matching symbols land on an active payline, usually left to right starting from the leftmost reel. Your total stake is spread across the lines, and each line win is the line bet multiplied by the symbol's paytable value.
Zap Attack! is played on a 5×5 grid with 25 paylines.
- Set your stake. Choose your total bet per spin. Wins are paid as multiples of this stake.
- Check the paytable. Open the game's info screen to see what each symbol pays and the exact rules for this version.
- Spin. Each spin's result is decided by a certified random number generator, independent of previous spins.
- Trigger the bonus. Land the required scatter symbols to start the free spins feature.
The full Zap Attack! guide: how winnings work, 4 features and 4 strategy tips
- Your stake plan: a $50 budget → about $0.17 a spin (high volatility)
- What 96.15% RTP costs per $100 wagered: $3.85 on average
- 4 features explained: expanding wilds, multipliers, symbol upgrades, free spins
- Stake plans for $20 to $250 budgets
- 2 RTP versions compared: 96.17%, 96.15%
- 4 slots with the same style and a higher RTP (up to 99%)
- Strategy tips and a session planner for Zap Attack!
Free · no card · 18+ only
Never sold · export or delete any time · What do members get?
How winnings work (members only)
What 96.15% RTP costs per $100 wagered, the 5,000x max win at a $1 stake
The top prize is capped at 5,000x your stake. On a $1 spin that is $5,000; on $0.20 it is $1,000. When the cap is reached the round usually ends immediately.
Multipliers are applied to wins as they land; in many games several multipliers add together or multiply each other, which is where the largest wins come from.
What 96.15% RTP means
Expected return = stake × 96.15%
Over $100 of total bets, the long-run average loss is $3.85
RTP is a long-run average across millions of spins. Any single session can finish far above or below it, especially on a high volatility game.
Features explained (members only)
4 features explained: expanding wilds, multipliers, symbol upgrades, free spins
Expanding wilds
When an expanding wild lands, it grows to cover its whole reel, turning one symbol into a full column of wilds.
Multipliers
Multipliers increase a win by a set factor, such as 2x or 10x. They can be attached to symbols, applied to a whole spin, or grow during a feature, and are a main driver of the biggest wins.
Symbol upgrades
Lower-paying symbols are transformed into higher-paying ones during a feature.
Free spins
A bonus round of spins played at no cost to your balance, usually triggered by landing three or more scatter symbols. Wins during the round are added to your balance, and many games let you retrigger extra spins.
Strategy tips (members only)
- Size your stake to the volatility. High volatility concentrates the return in rare, large wins. Long losing runs are normal. Keep stakes small (around 1% of your session budget or less) so you can ride out the swings. A simple rule: bring at least 300 spins' worth of budget, so a $50 budget suggests a stake of about $0.17.
3 more tips and a session planner
- Check which RTP version you're playing. Thunderkick offers this game at 96.17%, 96.15%. Open the game rules at your casino and prefer sites running the 96.17% version.
- Bonus wagering: at 96.15% RTP, clearing $1,000 of wagering costs about $38.50 on average. Check the bonus terms, as some casinos exclude specific games. Run your numbers in the wagering calculator.
- Set limits before you spin. Decide your loss limit and session time in advance and stop when you reach either. No pattern or betting system changes the outcome of a spin.
More on this in slot RTP and volatility explained and bankroll management.
Does it fit your budget? (members only)
Stake plans for $20 to $250 budgets
For high volatility we suggest a budget of at least 300 spins. This is what that means for Zap Attack!.
| Budget | Stake a spin | Bet range | Average cost of 300 spins |
|---|---|---|---|
| $20 | $0.07 | Bet range not published | $0.77 |
| $50 | $0.17 | Bet range not published | $1.92 |
| $100 | $0.33 | Bet range not published | $3.85 |
| $250 | $0.83 | Bet range not published | $9.62 |
Averages only: a short session can end far above or below them. Set a loss limit before you play.
RTP versions (members only)
2 RTP versions compared: 96.17%, 96.15%
Thunderkick supplies Zap Attack! in 2 RTP versions and each casino chooses which one to run. Over $1,000 of bets, the 96.15% version costs about $0.20 more on average than the 96.17% version.
| Version | Average cost per $100 wagered | Extra vs best |
|---|---|---|
| 96.17% (best) | $3.83 | — |
| 96.15% | $3.85 | +$0.02 |
Open the game's rules or info screen at your casino to see which version it runs.
Seen a different version at a casino? How member RTP reports work
Same style, better RTP (members only)
4 slots with the same style and a higher RTP (up to 99%)
Slots with the same mechanic (paylines) and volatility (high) as Zap Attack!, with a higher published RTP. Casinos can still run lower versions of any of them.
Mega Joker99% RTP · +2.85 pts
Jackpot 600098.9% RTP · +2.75 pts
Three Musketeers98.18% RTP · +2.03 pts
Wizards Want War!98.1% RTP · +1.95 ptsQuestions
Frequently asked questions
Who makes Zap Attack!?
Zap Attack! is developed by Thunderkick and was released in 2023.
What is the RTP of Zap Attack!?
The default RTP of Zap Attack! is 96.15%. Thunderkick also supplies versions at 96.17%, so check the game's info screen at your casino.
Is Zap Attack! high volatility?
Zap Attack! is rated high volatility. High volatility concentrates the return in rare, large wins.
What is the max win on Zap Attack!?
The maximum win on Zap Attack! is 5,000x your stake, which is $5,000 on a $1 spin.
Can I play Zap Attack! for free?
Yes. GambGenius members can play the official Thunderkick demo of Zap Attack! free on this page. It uses play money only, so demo wins can't be withdrawn, and it is for players aged 18 and over.
Does Zap Attack! have a bonus buy?
No bonus buy is listed for Zap Attack! in the sources we checked.
Where can I play Zap Attack!?
Opalis carries Thunderkick games. Check Zap Attack! is in the lobby in your country before you sign up. 18+ · New customers · T&Cs apply. Availability varies by country.
Where this data comes from
- thunderkick.com Provider
- slotcatalog.com Slot database
Specs come from the provider's own site and 1 independent slot database. Casinos can run lower-RTP versions, so always check the game rules before you play.
Game artwork © Thunderkick, shown to identify the game.
