Kaiju Slot Review
by ELK StudiosReleased Feb 22, 2018
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Anime-styled cyberpunk slot with expanding reels that grow from 243 to 7,776 ways during the Kaiju Battle bonus. Three monster difficulty tiers and vertical laser wilds.

Specifications
| Game Type | Slots |
|---|---|
| RTP | 96.3% |
| Volatility | Medium-High |
| Max Win | 1,304x |
| Grid | 5x3 |
| Paylines | 243 to 7,776 Ways |
| Min Bet | $0.2 |
| Max Bet | $100 |
| Hit Freq | 19% |
Kaiju Slot Overview
Kaiju is a monster hunt through a rain-soaked neon city, and its one big idea is that the reels grow taller as the fight goes on. A cyborg called HA-42 does the hunting. The beasts drop gems (which is as much plot as a slot needs), so a giant-monster movie ends up being a game about crystal clusters.
At rest it runs five reels, three rows, 243 ways. Stack three matching symbols on a single reel and a laser fires up through them, revealing a wild on the row above that counts for the spin that made it. That is the base game in full. Three HA-42 scatters on the middle reels start the Kaiju Battle, and there the same laser starts pushing reels upward for good, one row at a time, toward a six-row grid and 7,776 ways.
And ELK left out the bonus buy, so the Battle only arrives when the scatters allow it.
Theme & Design
The reels hang as a pale blue hologram over a street-level view down a Japanese city block at night, tram rails running away to a vanishing point underneath the grid. Signage does most of the work: a red KAIJU RESTAURANG sign, a BANK OF GEMS tower, an ELK Studios billboard wedged in among the kanji, and a big street display showing a monster silhouette lit purple against the skyline. Blade Runner by way of anime. It holds up better than most cyberpunk slots because the artists built a place instead of a backdrop.
The symbol set is where it thins out. Six paying symbols, and only three of them are properly drawn: faceted gem clusters in red, blue-violet and green. The other three are neon circuit-board cards with 150, 120 and 90 UNITS stamped on them, which is functional and a bit cheap next to the rest of the art. HA-42 herself is the best-looking thing on the reels, blunt fringe and a long violet ponytail, red eyes, framed in white light whenever she lands on reels two, three or four. The soundtrack sits low and broody and mostly keeps out of the way.
Symbols & Paytable
| Symbol | Payout |
|---|---|
| Red gem cluster | 1.5x / 2x / 3x for 3/4/5top paying symbol |
| Blue-violet gem cluster | 1.2x / 1.5x / 2x for 3/4/5 |
| Green gem cluster | 0.8x / 1.2x / 1.6x for 3/4/5 |
| Red 150 card | 0.5x / 1x / 1.5x for 3/4/5 |
| Blue 120 card | 0.4x / 0.8x / 1.2x for 3/4/5 |
| Green 90 card | 0.3x / 0.6x / 0.9x for 3/4/5 |
| Wild | substitutes for every paying symbolnever spins in, only appears where a vertical laser reveals it |
| HA-42 | no payout, three trigger the Kaiju Battlelands on reels 2, 3 and 4 only |
Features & How They Work
Vertical Laser
Three identical symbols stacked in a connecting vertical line fire a laser up that reel and reveal a wild on the row above. The wild is live straight away, counted in the evaluation of the spin that created it. In the base game a connecting line means a full three-high stack of one symbol, and each reel produces at most one extra wild per spin.
Kaiju Battle
Three HA-42 symbols on reels two, three and four award seven free spins and put a randomly chosen Kaiju on the other side of the reels. Each monster comes with its own pattern of five hot spots, one per reel, sitting on row four, five or six. That pattern is the round's ceiling and it is decided before the first spin, because a reel can never expand above its own hot spot. Draw a Kaiju with low hot spots and the grid stays short no matter how the spins go.
Reel expansion and extra spins
In the bonus a vertical laser does more than drop a wild. It pushes that reel up one row for the rest of the round, and every expansion adds a free spin to the counter. Grow all five reels to their limit and the grid runs five by six with 7,776 ways live. Seven spins is not much on its own, so expansions are the only thing keeping the round alive.
Hot spots and sticky wilds
When a laser reaches a hot spot, every symbol in that vertical line turns wild before the spin is evaluated. Reach the last remaining hot spot and the Kaiju is beaten: that line becomes sticky wilds that hold for whatever spins are left. Nothing is credited along the way, the whole round pays out once it ends.
Screenshots

How Kaiju Plays
It pays about one spin in five, and most of those are small. Six symbols, top gem worth 3x for a full line of five, so the base game trickles rather than swings. Lasers are the only spark in it. A whole reel of one symbol is rare enough that when a laser does go off it registers, even though the wild it drops usually adds pocket change.
The bonus plays like a level rather than a run of spins. Payout is held back to the end, every expansion buys another spin, and the round takes on a shape: climb early and it stretches, stall and it is over in seven. Two bonuses can feel like different games depending on the monster drawn, and the version where the reels are capped low arrives more often than the version where they climb. Between bonuses there is not much to hold attention, so you will probably remember the Battles and nothing else about a session.
Pros & Cons
Pros
- One rule, the vertical laser, drives the base game and the whole bonus, so nothing feels bolted on
- Expansions pay in extra spins, which gives a seven-spin round somewhere to go
- Street-level cyberpunk art with more personality than the usual neon wallpaper
Cons
- A 1,304x ceiling is low for a game that runs this dry
- Six paying symbols, three of which are number tiles
- The Kaiju drawn caps the round before it begins, and the low patterns come up often
- Base game gives you little to do between bonuses
Is Kaiju Worth Playing?
One idea, worked all the way through. The laser is the base game, the expansion engine, the wild generator and the win condition of the bonus, and ELK resisted stacking anything else on top of it. The hot spot pattern gives the Kaiju Battle a target instead of a countdown, which is more than most seven-spin rounds manage.
What it lacks is a top end. 1,304x is thin for a game this volatile, and the symbol set is thinner still, so anyone chasing a five-figure multiplier is in the wrong place. Kaiju suits short sessions played for the bonus. How well one of those sessions goes comes down to which monster turns up, and that is either the most interesting thing about the design or the most annoying.
Frequently Asked Questions
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Reviewed by Arina, PR & Content Manager
PR & Content Manager at SlotsReach
Published 31 Jul 2026 · Updated 31 Jul 2026