Primal Hunter GigaBlox Slot Review
A carved stone reptile juts from the mossy frame of Primal Hunter GigaBlox, jaws open, eyes glowing amber, a torch burning on a spear-bound plinth below. ReelPlay has built a game where the base game is mostly camouflage: the giant blocks arrive every spin, the wins barely register, and everything of consequence sits behind five skulls.
The specs are solid rather than spectacular: a 6×4 grid, 40 paylines, medium-high volatility and a 96.04% RTP, with wins capped at 8,622x the total bet. The oversized-symbol format underneath is the same family of engine that also powers Hypernova Megaways and Hercules 10K Ways, sitting here alongside studio stablemates like Atlantis 10K Ways.
Every spin guarantees at least one giant symbol block, which keeps the base game moving even when the wins are modest. The hunt, in every sense, is for five scatters.
Base Game & Features
Primal Hunter GigaBlox runs on a 6×4 grid with 40 fixed paylines. All wins pay left to right from the leftmost reel, on adjacent reels only, and all wins are multiplied by the total bet. Stakes run from 0.40 to 14 per spin.
Under the hood, the stake splits into a base bet and a line bet. The base bet is the total bet divided by 40, one share per line, and that’s the figure the paytable arithmetic hangs off. Coinciding wins on different paylines are added together, while only the highest combination counts on each active line.
Gigablox Symbols
The headline mechanic is the one in the title. On every spin, at least one reel carries a Gigablox: an oversized symbol block in a formation anywhere from 2×2 up to 4×4. Each cell of a block counts as an individual symbol for line purposes, so a 4×4 premium block can complete paylines across four rows at once.
Any symbol can arrive as a Gigablox, including the wild HUNTER and the scatter. That guarantee is the engine’s quiet trick: no spin goes by without something oversized on screen, and oversized scatters count cell by cell towards the trigger.
The mechanics feed each other. A 4×4 scatter block landing across the grid delivers sixteen scatter cells in one go, which is why a single oversized skull can carry you into the feature on its own. Block size doesn’t change what a symbol pays, only how many chances it has to connect.
Cascades and Explosions
Every winning symbol except the scatter explodes and is replaced by symbols falling from above, which can chain into further wins. When any part of a Gigablox is used in a win, the whole block goes up.
The split rule is the interesting detail. If an explosion leaves a gap below a Gigablox that the block’s width can’t fit into, the Gigablox breaks apart into single 1×1 symbols to fill the space. A big block that helped you win once can therefore scatter into smaller pieces and change shape entirely for the next cascade.
That reshuffling matters more than it looks. A block that splits into 1×1 symbols no longer covers several rows at once, but those singles can each settle into fresh combinations with whatever falls in around them, so a single spin’s shape can change completely between cascades.
Wild and Paytable
The HUNTER wild substitutes for all symbols except the scatter, and it’s also the richest symbol on the grid. Symbol pays at the default 1.20 total bet, for six, five, four and three of a kind:
- Hunter wild: 10 / 2.50 / 1 / 0.50
- Premium symbol one: 3.75 / 1.50 / 0.75 / 0.375
- Premium symbol two: 3 / 1.25 / 0.625 / 0.30
- Premium symbol three: 2.50 / 1 / 0.50 / 0.25
- Premium symbol four: 2 / 0.75 / 0.375 / 0.175
- Low symbol one: 1.50 / 0.50 / 0.25 / 0.125
- Low symbol two: 1.25 / 0.50 / 0.25 / 0.125
- Low symbol three: 1 / 0.375 / 0.20 / 0.10
- Low symbol four: 0.875 / 0.375 / 0.20 / 0.10
- Low symbol five: 0.75 / 0.25 / 0.125 / 0.075
- Low symbol six: 0.625 / 0.25 / 0.125 / 0.05, and it pays 0.05 for just two of a kind
One structural point worth noticing: only positions containing the winning symbol count towards that symbol’s win, so a Gigablox block doesn’t automatically sweep its whole width into every payline. The top end of the table is thin. Even six wilds returns a touch over eight times the bet.
The scatter is a skull symbol, and five or more of them anywhere on the reels is what unlocks the feature. With a 26.6% hit frequency overall, the base game pays out often enough to keep the balance ticking, though most of those wins sit at the low end of the table above.
Primal Hunter GigaBlox Free Spins
Landing five or more scatter symbols triggers the free spins, with two spins awarded per scatter. Five scatters means ten spins; eight means sixteen. Free spins play at the same lines and bet as the triggering spin.
The multiplier is what the round is built around. It starts at x1, and every symbol win during the feature is multiplied by it. Each cascade pushes the value up by one, and there’s no upper limit at all.
The detail that shapes the whole round: the multiplier doesn’t reset between spins. It’s maintained for the entirety of the feature, so a long chain of cascades on the final spin pays far more than the identical chain would have on the first. Volume of cascades, not volume of wins, is what a good round accumulates.
Retriggers use the same scatter threshold. Five or more skulls inside the round add one spin per scatter, and the multiplier holds at whatever value it had reached. Once the feature ends, it resets to one.
Our Honest Verdict
Overall Rating: 7.1/10
This is a long stalk through quiet jungle. The reels always have something oversized to look at, the wins mostly just cover the ground, and the entire session quietly counts skulls. That’s the one reason to sit down here: the moment five of them finally line up.
When it lands, the feature earns the wait. A multiplier that climbs with every cascade and holds its value spin after spin, with no ceiling, is the best piece of design in the game – one good chain on the last spin can outrun the whole round before it.
The weakness is the door itself: five scatters is a demanding ask at medium-high volatility, and a thin top paytable means the waiting isn’t well paid. So it suits the patient sort who like an uncapped build and can sit through the dry stretches. Regular bonus hunters will spend most of their time in the ferns. For those content to wait, the hunt is worth it.
Primal Hunter GigaBlox FAQs
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What is the RTP of Primal Hunter GigaBlox?
The RTP is 96.04%, which sits just above the typical online slot average. -
Is Primal Hunter GigaBlox high volatility?
It’s rated medium-high, so wins can be sizeable but the gaps between them can stretch. -
How many paylines does Primal Hunter GigaBlox have?
There are 40 fixed paylines on a 6×4 grid, with wins paying left to right from the leftmost reel. -
What does the Gigablox mechanic do?
Gigablox symbols arrive in oversized blocks anywhere from 2×2 up to 4×4, and each cell of a block counts as a separate symbol for line wins. The wild and the scatter can both land this way, and at least one Gigablox reel is guaranteed on every spin. -
How do you trigger free spins in Primal Hunter GigaBlox?
Five or more scatter symbols anywhere on the reels trigger the feature, awarding two free spins per scatter symbol. -
Can the free spins retrigger?
Yes. Five scatters or more during the round restart the counter, with a single extra spin given for each scatter that lands. -
What is the maximum win on Primal Hunter GigaBlox?
The maximum win is 8,622x the total bet. -
What is the bet range on Primal Hunter GigaBlox?
Stakes run from 0.40 to 14 per spin across the 40 paylines.

