Hacksaw GamingHacksaw Gaming

    Buffalo Stack'n'Sync

    9.0/10
    Release May 2022· Updated June 2026

    Hacksaw's first Stack'n'Sync slot (May 2022). Stampede x100 multipliers on a 5x4 grid, max win 10,000x. BetsRank score: 9.0/10.

    RTP
    96.36%
    Volatility
    High
    Max Win
    10 000x
    Grid
    5x4
    Bonus Buy
    Yes
    Stack'n'Sync mechanic signatureStampede x100 multipliersWilds + sticky reelsFree spins bonusFormat 5x4 / 10 paylines
    Buffalo Stack'n'Sync
    🎰

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    9.0

    BetsRank Verdict

    Hands-on testing by Alexandre Dubois — bonus tested, multiple sessions

    Released in May 2022, Buffalo Stack'n'Sync was the FIRST Hacksaw slot to introduce the signature Stack'n'Sync mechanic. Format 5x4 / 10 paylines, RTP 96.36% top-tier, max win 10,000x, volatility 4/5. Stack'n'Sync: symbols form stacks and synchronise when multiple identical stacks appear, triggering a respin. Stampede brings x100 multipliers. Wilds plus free spins. A high-risk math model that tests your resolve but can push wins dramatically higher. 3 feature buy options for direct entry.

    Strengths

    • +RTP 96.36% — top tier for Hacksaw
    • +Signature, original Stack'n'Sync mechanic
    • +Stampede x100 multipliers
    • +The first Hacksaw slot with Stack'n'Sync
    • +3 feature buy options

    To consider

    • −Volatility 4/5 — needs a solid bankroll
    • −10 fixed paylines is a limited format compared with cluster pays
    • −A 2022 slot, since overshadowed by newer releases

    About Buffalo Stack'n'Sync

    Released in May 2022, Buffalo Stack'n'Sync was the FIRST Hacksaw slot to introduce the signature Stack'n'Sync mechanic, later reused across the studio's catalogue. Format 5x4 / 10 paylines, RTP 96.36% top-tier for Hacksaw, max win 10,000x, volatility 4/5.

    The visual world is set on the American Great Plains with galloping buffalo and a warm ochre-orange dusk palette. The signature mechanic is Stack'n'Sync — symbols form stacks on the reels, and when several identical stacks line up, they synchronise and trigger a respin with those stacks locked in place.

    An additional mechanic, Stampede, brings x100 multipliers that amplify wins. Wilds plus a free spins bonus round out a high-risk math model. 3 feature buy options are available for direct entry (with a boosted RTP). Wins are formed by 3 to 5 matching symbols left to right starting from reel 1.

    Key features

    • ▸5x4 format / 10 paylines
    • ▸Official RTP 96.36% top-tier
    • ▸Volatility 4/5
    • ▸Max win 10,000x
    • ▸SIGNATURE Stack'n'Sync mechanic
    • ▸Stampede x100 multipliers
    • ▸Wilds + sticky reels
    • ▸Free spins bonus
    • ▸3 feature buy options
    • ▸The first Hacksaw slot with Stack'n'Sync (2022)
    💰 Bonus Buy: 3 levels available

    ❓Buffalo Stack'n'Sync FAQ

    What is the RTP of Buffalo Stack'n'Sync?▾

    Official RTP is 96.

    36% — top-tier for Hacksaw. It increases with feature buy purchases. Always check the in-game "i" icon.

    How does Stack'n'Sync work?▾

    Symbols form stacks (vertical piles) on the reels.

    When 2 or more identical stacks appear, they synchronise and lock into place. A respin then triggers with those stacks locked.

    What is Stampede?▾

    A bonus mode with x100 multipliers.

    It activates during free spins or via bonus buy. Buffalo stampede across the grid, applying the x100 to any wins formed.

    Is Buffalo Stack'n'Sync available to play?▾

    Yes — available at the crypto-friendly casinos in BetsRank's top list that feature Hacksaw Gaming.

    Who is Buffalo Stack'n'Sync for?▾

    Buffalo-theme fans looking for the game that founded Hacksaw's Stack'n'Sync mechanic.

    Volatility of 4/5 calls for a solid bankroll. For a more modern take on Stack'n'Sync, check out Stack'Em in our existing catalogue.

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    Try the official demo on Hacksaw Gaming's site
    Alexandre Dubois
    Alexandre Dubois

    Online Casino & Bonus Expert

    Last updated: 6/27/2026

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    Slot sheet last updated on · Sources: slotcatalog.com, official provider sites, BetsRank hands-on testing