Buffalo Stack’n’Sync: Slot Overview

Just to set the mood for this review, here’s a Jim Morrison line to open with; “We are from the west. The world we suggest should be of a new wild west… Strange and haunting. The path of the sun…” If Jim hadn’t been the voice of the psychedelic rock band The Doors, you could almost imagine him dreaming up online slots—because the Wild West, in all its many interpretations, remains one of the most-used themes out there. Buffalo Stack’n’Sync from Hacksaw Gaming isn’t the classic shootout take, but it’s set on the Great Plains, which sits west of the Mississippi River, so it still fits the bill.

To sell the setting, Hacksaw surrounds the reels with cacti and rugged rock formations, giving the game a lonely, slightly eerie atmosphere—in a good way. It’s the kind of landscape where half-mythic guides take wanderers on spiritual journeys, and where determined explorers can get lost only to “find” themselves again. Or, as Hacksaw describes it, a land of “great buffalo, soaring eagles and grass swaying in the wind.” Truthfully, the grass is in short supply. The wildlife, on the other hand, is everywhere—especially the bison, which play a key role in triggering Buffalo Stack’n’Sync’s most thrilling moments.

Hacksaw Gaming has a reputation for volatile releases, and while Buffalo Stack’n’Sync isn’t the wildest ride in their catalogue, it still carries a 4 out of 5 volatility rating. Like many modern slots, it comes with variable RTP, so it’s worth checking which version you’re playing—the highest setting returns 96.36%. That figure applies to standard play, though, as the theoretical RTP rises if/when you purchase one of the three feature options. Buffalo Stack’n’Sync runs on everything from mobile to desktop, with stakes ranging from 10 p/c to $/€100 per paid spin.

On the mechanics side, Buffalo Stack’n’Sync uses a layout of 5-reels, 4-columns, and 10 static paylines. Wins land when three to five matching symbols connect left to right, beginning from the leftmost reel. The symbol set is familiar for the theme: low-paying 10-A card ranks and five premium animal icons—horses, cougars, wolves, eagles, and bison. A five-of-a-kind pays 2 to 4 times the bet for card symbols and 10x to 20x the bet for the higher-value symbols. Cactus wilds can appear on any reel to replace all paying symbols, and if five land on a payline, they pay the same as the bison.

Buffalo Stack’n’Sync: Slot Features

A couple of extra symbols also show up in Buffalo Stack’n’Sync to activate specific mechanics. The bonus symbol appears in the base game only, the Stack’n’Sync symbol can land in the base or bonus game, and the Stack symbol is exclusive to Stampede Spins. Here’s what each one does.

Stack’n’Sync

When an S’N’S (Stack’n’Sync) symbol lands, the reel it hits is boosted with 15, 30, 45, or 60 symbols of one type. On top of that, you receive 1 respin for every S’N’S symbol visible. If additional S’N’S symbols appear during a respin, those reels become synced with the reels that are already stacked, and more respins are added.

Stampede Reels

When a stack of buffalo symbols lands on a reel, they combine to form a Stampede Reel carrying a multiplier of x1, x2, x3, x4, x5, x10, x15, x20, x25, x50, x75, or x100. These reels are not wild and they only connect with buffalo symbols on the other reels. The multiplier applies to any buffalo win, and if multiple Stampede Reels are involved, the multipliers are added together.

Free Spins

Trigger the feature by landing 3 flaming scatter symbols, which awards 10 free spins. In the free spins round, high-paying symbols are more likely to land stacked than in the base game, which effectively improves the chances of forming stacks of buffalo symbols.

Stampede Spins

Hit 4 bonus symbols to start this mode, where the reels show only buffalo symbols, Stack symbols, or value-less skull symbols. Whenever a Stack symbol lands on a reel, 5-60 buffalo symbols are added to that reel, replacing skull symbols. Plus, +1 additional free spin is awarded for each Stack symbol currently in view.

Buy Bonus

If available, pressing this button opens three bonus purchase choices. The first costs 15x the bet for a round that guarantees an S’N’S symbol and at least one respin (RTP 96.4%), followed by 100x the bet for free spins (RTP 96.46%), or 250x the bet for Stampede Spins (RTP 96.5%).

Buffalo Stack’n’Sync: Slot Verdict

Coming off Hand of Anubis and Itero, it was a bit unexpected to see Hacksaw lean into such a familiar theme. Still, they’ve done what they usually do: apply their creativity to deliver a distinctive slot that should appeal to players who want a game with some volatility, blending both classic ideas and newer twists. We say “some” volatility, but Buffalo Stack’n’Sync can be pretty ruthless. As people often note, Hacksaw titles can feel like “Lambo or Ramen,” and Buffalo Stack’n’Sync is perfectly happy to deliver nothing at all if it never catches fire. For some, that’s part of the appeal; for others, it’ll be a reason to step aside and avoid the stampede.

At this point, a certain level of inventiveness is expected with every Hacksaw launch, and Buffalo Stack’n’Sync lives up to that standard. In many respects, the game is straightforward once you strip it back: land S’N’S tiles to stack symbols on the reels, then connect as many of those stacked symbols as you can to score line wins. Generally, the more respins you manage to extend, the better, with the ultimate goal being stacked bison that turn into Stampede Reels. With that in mind, the 15x entry-level feature buy may be especially tempting, and it’s likely to be welcomed by bonus buyers who want a lighter commitment than paying for a full bonus round.

Stampede Spins add a bit more going on, though they can still be aggravating—particularly when stacks of bison keep getting added to the same reel or reels and never seem to line up. Other times, it swings the opposite way, and because stacked bison can create Stampede Reels with potentially huge multipliers, strong outcomes are definitely possible. When it hits its stride, Buffalo Stack’n’Sync can produce wins up to 10,000x the bet. That’s a solid ceiling, but if you want even more punch, Bison Battle from Push Gaming could be the better pick. Either way, both titles are quality options that use smart mechanics to rise above the well-worn theme they’re built on.