777 Super BIG BuildUp II Double Deluxe

777 Super BIG BuildUp II Double Deluxe: What We Know

Crazy Tooth Studio's 777 Super BIG BuildUp II Double Deluxe is, as the title suggests, a follow-up entry in the developer's ongoing BuildUp series — a "double deluxe" sequel that leans on the studio's established fondness for lucky-sevens branding and outsized, feature-heavy slot mechanics. Detailed breakdowns of its specific bonus mechanics haven't been widely published yet, so this overview leans on the confirmed technical specification rather than speculation about exact feature names.

Reel Layout and Structure

The game runs on a 5-reel grid generating 576 paylines, a notably higher number than the studio's earlier 127-payline titles in the same numbered "777" family, suggesting a wider, more filled-out grid designed to create more frequent combination opportunities across the reel set.

RTP, Volatility and Hit Frequency

777 Super BIG BuildUp II Double Deluxe carries a 96.22% RTP, a genuinely strong figure that sits above most of its stablemates in the 777-branded lineup, and pairs it with a Medium volatility rating rather than the High or Very High ratings seen elsewhere in Crazy Tooth's catalogue. That combination points to a comparatively smoother, more balanced session structure. The published hit frequency of 27.68% backs this up further — noticeably higher than the roughly 16% rate seen in some of the studio's other 777 titles, meaning wins should land considerably more often here, even if many of them will be modest in size.

Betting Range and Max Win

Stakes are set between 15p/c and £/€37.50 per spin, a slightly more compact range than some of the studio's other releases, and the game tops out at a max win of 6,496x the stake — a solid, achievable-feeling ceiling that fits comfortably with the Medium volatility rating rather than promising the kind of extreme, rare-air prizes found in the studio's High-volatility titles.

Reading the Numbers

Put together, the RTP, volatility, and hit frequency here tell a fairly coherent story: this is likely the gentler, more forgiving member of Crazy Tooth's 777 series, built for players who want the studio's trademark oversized grids and lucky-number branding without quite the same punishing dry spells as its High-volatility siblings.

Verdict

777 Super BIG BuildUp II Double Deluxe stands out within its own family for offering a stronger RTP, calmer Medium volatility, and a noticeably better hit rate than its 777-branded relatives — a combination that should suit players who want steadier returns over a session rather than chasing rare enormous hits. As with any newer or less-documented release, the smart move is to run the free demo at johnessyslots first and get a direct feel for the BuildUp mechanics before committing real stakes.