Fish Boom
Fish Boom game by InOut Games blends slot-style presentation with instant tile-picking action, turning each cast into a quick outcome reveal. The 4x5 grid refreshes every round, win values sit directly on tiles, and TNT symbols can blow open a 3x3 zone for extra payouts. RTP sits at 96.3%, max win reaches $20000, and bets range from $0.1 to $200. Free Spins come from filling the meter, and the release supports Provably Fair verification. Play the Fish Boom demo on SlotCatalog to feel how this hybrid concept behaves during real sessions.
| Provider: | InOut Games |
|---|---|
| RTP 🔗: | 96.3% |
| Variance: | N/A |
| Max Win: | N/A |
| Betways: | 1 |
| Release Date: | 2025-11-18 |
| SlotRank: | 11019 |
| All attributes > | |
Online Casinos where you can play Fish Boom
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Fish Boom Game Review
InOut Games are widely known for their Chicken Road saga, and they definitely are not shy to milk those chickens dry. The formula works, so why stop. Still, they occasionally twist things around. Fish Boom instantly gave me that déjà vu. The situation strongly mirrors how Chicken Royal relates to the original step multiplier: we take the core idea, drop the stepping part, borrow the visuals and theme, and turn it into a non step multiplier spinoff. Here, the connection feels similar to what happened when Fish Road appeared as a thematic cousin.
Then I launched today’s game and felt frustration creeping in. Seems like InOut’s design team said: “Cluck it, we go full Insaneo Style”, and the result feels like a strange cadaver of slot mechanics stitched to an instant format.
Before we dive into this underwater mess, a quick glance at the provider. InOut Games operates from Europe and keeps pushing instant-style content like crash releases, step multipliers, and tap-to-play arcade formats that fit rapid mobile sessions. The studio runs certified RNG setups and ships its games to licensed casinos through big aggregation networks. Their catalogue sticks to a clear formula: compact math, short rounds, and instant load times that feel almost suspicious.
Let me explain the source of my frustration with this game. Fish Boom adopts a tall 4x5 layout with what could be called a single betway if we treated it like a slot. We should avoid that mindset, because while the grid spins and symbols drop, wins come from picking a random tile. Think of it as literal fishing: each spin refreshes the layout, you cast the hook, and whatever tile gets snagged determines the payout.

The board shows plenty of fish, although most of them behave identically, with only a couple of special cases. Win values sit directly on the tiles and get refreshed every round, with bigger prizes usually hiding deeper. Not every tile hosts a fish, so sometimes the hook lands on sad empty space. From familiar mechanics, we see bonus symbols, a free spins feature, and a bonus bet for those who want more explosive sessions.
Time for some numbers. RTP sits at 96.3%, which feels comfy enough for casual dipping. Max win reaches $20000, so if stars align for a megajuicy payout, try not to drool too early. Bet range sticks to InOut’s usual comfort zone, running from $0.1 to $150 and covering most budgets without stretching anything too far.
Fish Boom also works with Provably Fair technology, giving players the option to verify every round. You can check that no external trickery poked the result and that the outcome stayed transparent from start to finish.
Provably Fair technology relies on cryptographic methods that prevent both the casino and the developer from altering the outcome during gameplay. Before each round starts, the system creates a hidden server seed, while the player’s device provides a client seed. These values combine to form the final result, and after the round ends, you can verify it through any HASH generator to confirm that everything remained legit and untouched.
Fish Boom Game Features
Now that the basics are clear, time to peek under the surface and see what actually drives Fish Boom. The game mixes familiar bits from instant formats with a few spicy twists that can shake the water nicely. Nothing overly complex, yet there are some toys worth mentioning.
Special Symbols
Besides normal fish, we have two types of special symbols that change the flow:
- Big fish: A chunky fella who covers two tiles. Hook any of the occupied spots and you get paid for both.
- TNT: Because normal fishing is for calm people. Hit the dynamite and the explosion cashes out a 3x3 zone around it, turning the screen into an underwater barbecue.
Free Spins
No special combinations or lucky stars required. Each spin fills a meter around the spin button, and once full, a mini event triggers and grants 2–50 Free Spins. The feature stays locked during Free Spins, so retriggers are off the table, and Bonus Bet rounds do not contribute to the meter.

Bonus Bet
Feeling risky? Double your base wager to get more TNT symbols in the mix. Landing one still depends on luck, and the extra cost does not guarantee fireworks. Keep in mind that the base bet for this option caps at $100, making the total reach $200.
Theme and Graphics
Obviously, this release swims straight into the fishing tag. InOut Games knows how to present their titles in a pleasant way, and Fish Boom keeps that trend alive. The backdrop shows a calm ocean floor with rocks and plants, while the fish themselves look comically cute, almost like they escaped from a kid’s cartoon.
Animations feel playful enough to keep your attention, and the special effects add tiny bursts of flair when hooks land or TNT goes off. Sound effects stay light and bouncy, supporting the underwater vibe without drilling into your skull during longer sessions.
Pros and Cons of Fish Boom Game
Pros
- Original formula blending slot mechanics and instant action
- Comical visuals and fun underwater theme
- Provably Fair verification available
Cons
- Core gameplay feels like blind tile picking
- Limited feature impact during long sessions
- Gameplay loop lacks depth
Fish Boom Free Play
Not sure if you want to dip your hook into this fishing contraption yet? No worries. You can test the Fish Boom demo right here on SlotCatalog. No sign-ups, no deposits, just pure Fish boom free play where you can cast the hook, blow up half the reef with TNT, and see if any chunky fish decide to pay up before you move to real wagers.
Final Words
Fish Boom managed to surprise me with its fresh core and flow. It plays well, looks good, and can keep you engaged for at least one session. I feel the concept sits on a huge pile of untapped ideas, waiting for someone in the office to scribble new stuff on a whiteboard. Hold n Win, jackpots, bonus wheels, extra grids, who knows. I genuinely hope InOut keeps tinkering with this format, because the foundation feels promising and could evolve into something far more entertaining.
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Scanned Countries
Sorry, Fish Boom is not available for this market. In total, we scanned casinos at 79 in various markets. Fish Boom is available in 39 countries. The markets with the highest number of casinos are: CA, AT, NZ, AU
| Country | Scanned [i] | With Game [i] | In Lobby [i] | SlotRank [i] | Action |
|---|---|---|---|---|---|
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626 | 157 | 0 | 11019 | See Data |
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359 | 119 | 2 | 10971 | See Data |
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408 | 113 | 1 | 13400 | See Data |
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194 | 95 | 0 | 3787 | See Data |
Show All Countries (39)
Contents
Fish Boom Attributes
| Provider: | InOut Games |
|---|---|
| Release Date: | 2025-11-18 |
| Type: | Other types |
| RTP: | 96.3% |
| Variance: | N/A |
| Hit Frequency: | N/A |
| Max Win: | N/A |
| Min bet $, €, £: | 0.01 |
| Max bet $, €, £: | 150 |
| Layout: | 4-5 |
| Betways: | 1 |
| Features: Bonus Bet, Bonus symbols, Feature: Random reward, Free Spins | |
| Theme: Fish, Fishing, Ocean, TNT | |
| Other tags: 96% RTP | |
| Technology: | JS, HTML5 |
| Game Size: | 30.5 MB |
| Last Update: | 2026-02-23 |



