Play Demo
A radio crackle cuts through the first few spins of the Big Rig Convoy slot, inviting players to press the horn mounted on the right side of the reels. Tap it, and a truck horn blasts across the desert highway backdrop, adding nothing to the numbers but everything to the mood. Storm Gaming built this 5×4 trucker slot around a hold-and-win Big Rig Feature with three colour-coded grid tiers, four fixed jackpots, and a random Convoy that sends trucks rolling through the reels between triggers. It carries more feature weight across forty paylines than the trucking theme alone would suggest!
On any spin, the Convoy can fire without warning. Five reel positions align to form a truck across the grid, and once confirmed the feature begins. Trucks of varying sizes roll across the screen from right to left, each carrying cash values or multipliers that add to a running total.
The round continues until a police car appears on the reels, triggering a “Convoy Busted” screen and paying out whatever the trucks delivered. There is no way to predict when it fires or how many trucks will pass before the law arrives.
Three scatter symbols landing on reels one, three, and five trigger the Big Rig Feature, with the colour of the truck on reel five deciding which tier plays.
The feature starts with three respins, and every new symbol that lands resets the counter back to three, or to the current maximum if trucks have increased it. When the counter runs out or the grid fills completely, the round ends and all values are totalled. A full grid awards the Grand Jackpot on top of everything else collected.
Cash symbols carrying stake multiples are the base currency of the grid, but several modifier types land alongside them and reshape the totals.
The Big Rig Bonus can be bought for 50× stake. The reels spin, and the truck landing on reel five determines which colour tier plays, so a purchased entry can land on blue, green, or red at random.
Separately, a Bonus Upgrade can appear during standard play when two bonus symbols land fully on reels one and five or reels three and five. When this fires, the reel five bonus banner grows by one position, up to a maximum height of four symbols, making it easier to trigger the feature naturally on future spins.
Three big rigs sit above the reels in formation against a sunset desert backdrop, with cacti, dust clouds, and telegraph poles framing the 5×4 grid. Forty fixed paylines run left to right on consecutive reels, and the Wild substitutes for everything except scatters and bonus symbols. Autoplay supports turbo spin, quick spin, and skip-screens.
A pair of air horns mounted to the right of the grid can be tapped at any point during play to sound a truck horn, and holding the button opens a collection menu showing which horns have been unlocked based on total spins played. New horns are announced audibly and at the bottom of the screen as they unlock, though they are session-based and reset between visits.
At a £1.00 total bet, the Convoy Wild and the Big Rig truck share the top of the paytable at £5.00 for five of a kind, with the Police Car sitting below at £3.00. The gap between the themed premiums and the card values is narrow across the board, and no symbol pays for fewer than three on a line.
| Symbol | ×5 | ×4 | ×3 |
|---|---|---|---|
| Convoy Wild | £5.00 | £2.00 | £1.00 |
| Big Rig | £5.00 | £2.00 | £1.00 |
| Police Car | £3.00 | £1.20 | £0.60 |
| Trucker | £2.50 | £1.00 | £0.50 |
| Truck Stop | £2.00 | £0.80 | £0.40 |
| A | £1.50 | £0.60 | £0.30 |
| K | £1.00 | £0.40 | £0.20 |
| Q | £1.00 | £0.40 | £0.20 |
| J | £1.00 | £0.40 | £0.20 |
| 10 | £1.00 | £0.40 | £0.20 |
| Tier | Value |
|---|---|
| Grand | £1,000.00 |
| Major | £250.00 |
| Minor | £50.00 |
| Mini | £10.00 |
Big Rig Convoy earns 4 out of 5 by committing to its American trucker theme harder than most slots bother to. The hold-and-win Big Rig Feature runs three escalating grid sizes with colour-coded modifiers that interact with each other across positions, and the random Convoy adds a second feature path that keeps the session moving between triggers.
Frequent small wins kept our balance stable from the opening spins, with £1.40 to £4 returns landing regularly across the forty paylines. Nothing dramatic, but enough forward motion that 100 spins at £1.00 left us at £999, essentially flat from a £1,000 start. The game felt active even when the features were not running. Small wins landed consistently enough to keep the balance steady, and that consistency is a credit to the way the 40 paylines distribute value throughout a session.
Around spin twenty, the Convoy fired for the first time. Four trucks and a school bus rolled past the reels before a police car pulled in to end it, paying £13 for the sequence. A country-rock convoy song kicked in as the trucks passed and refused to leave our heads for the rest of the session. Not long after, a Bonus Upgrade expanded the reel five banner, and three spins later a second Convoy triggered for £14. Two random features in quick succession gave the early session a rhythm that standard play alone would not have produced.
Buying the Big Rig for £50 switched the backdrop from sunset to night. A rig pulled a stars-and-stripes trailer across the screen, its doors opening to reveal the hold-and-win grid. Our first buy landed on the blue tier, the smallest 4×5 grid with only Mini and Grand jackpots active. Nine of the twenty positions were filled across four respins, and a pink Mini tyre worth 10× alongside a 12× multiplier pushed the total to £44. Short of the £50 buy-in, but the modifiers showed they could compound even on the smallest grid.
A second buy also landed on blue, the same 4×5 grid with Mini and Grand as the only active jackpots. Even on the smallest tier, the modifiers produced a noticeably stronger round. Collectors started chaining values from adjacent positions, and a blue Sheriff Multiplier landed next to a cash symbol that had already been boosted by an Adder, lifting one position to 10× on its own. That round closed at £64, comfortably above the buy-in and a reminder that the modifier interactions can compound even on twenty positions. A green or red entry would have added rows, extra jackpots, and more surface area for those same interactions to build across, which makes the random tier assignment on each buy feel like the game’s biggest variable.
Both feature entries switched from dusty sunset to a darker blue night the moment the rig pulled onto the reels, and the shift in mood matched the shift in stakes. The convoy song that played during the random feature stayed lodged in our heads long after the reels stopped, and the horn sitting on the right side of the screen kept pulling us back to tap it between spins. Storm Gaming delivered more here than the trucking wrapper led us to expect!