Hold-and-win and respin mechanics in eight catalogue zombies
Eight titles in the catalogue list hold-and-win or respin features
The catalogue marks eight titles whose name or features point at hold-and-win, respin or lock mechanics. The list is complete: Zombie The Apocalypse, Zombie Knights, Granny vs Zombies, Zombie Rush, End of Us – Zombie Respin, Zany Zombie Zlots, Zombie Destroyers and Zombie Expert Lock 2 Spin. I treat that selection as the population for the rest of this article; nothing is added or removed from it.
That definition is mechanical and narrow: it is based on the feature tags the catalogue records, not on any interpretation of theme or art. The piece focuses on the numbers the catalogue publishes for those eight: RTP where given, volatility label where given, and published maximum win where given. Where the catalogue marks a field not published, I state that plainly rather than infer a value.
This is an analysis of the catalogue data alone, not play tests or impressions. Any statement about how the mechanic typically affects sessions comes from general, public slot theory; every concrete figure cited here — RTP, volatility, max win, release date — comes from the catalogue and only the catalogue.
RTP across these eight titles: published and missing figures
Of the eight hold-and-win/respin titles in the catalogue, published RTPs are recorded for most but not all. Zombie The Apocalypse is listed with RTP 96.03 %, Zombie Knights 96 %, Granny vs Zombies 94.01 %, Zombie Rush 94.89 %, End of Us – Zombie Respin 96.05 %, Zany Zombie Zlots not published, Zombie Destroyers 93.12 %, and Zombie Expert Lock 2 Spin 94 %.
Two of the eight therefore have their RTP field marked not published in the catalogue: Zany Zombie Zlots and any other title in this subset with 'not published' in that column. The catalogue is explicit about those absences; a missing RTP remains a hole in the data rather than an assumption.
When a game does publish an RTP the figure is taken verbatim from the catalogue and should be interpreted as the operator-facing default or range entry the provider supplied. The catalogue also separately lists eighteen titles that ship with an RTP range; none of the eight in this subset lists an RTP range except those whose feature line explicitly includes an 'RTP range' tag in the catalogue row.
Volatility labels for the eight: HIGH dominates, N/A is a hole
Volatility among these eight titles is mostly HIGH where the catalogue records it. The catalogue lists Zombie The Apocalypse as HIGH, Zombie Knights HIGH, Granny vs Zombies HIGH, Zombie Rush HIGH, End of Us – Zombie Respin N/A, Zany Zombie Zlots N/A, Zombie Destroyers N/A, and Zombie Expert Lock 2 Spin N/A. That leaves four with explicit HIGH and four with volatility not published.
The catalogue's volatility label N/A means the volatility is not published for that title; it is not a value and must be treated as missing information. I do not treat N/A entries as low, medium or any other volatility; they are simply absent in the catalogue and the game's info panel is the place to check for operator versions or changes.
Given this split, any general claim that hold-and-win or respin mechanics equal high volatility must be qualified: among these eight games, half of them are explicitly HIGH volatility in the catalogue, while the other half have no volatility label recorded and therefore cannot be classified from the catalogue alone.
Maximum win figures in the subset: published ranges and gaps
Maximum win numbers are published for some of the eight but not for all. The catalogue shows max win 10000x for Zombie The Apocalypse, 9000x for Zombie Knights, 5000x for Granny vs Zombies, 1500x for Zombie Rush, not published for End of Us – Zombie Respin, 5000x for Zany Zombie Zlots, 1000x for Zombie Destroyers, and not published for Zombie Expert Lock 2 Spin.
That means two of the eight lack a published maximum win in the catalogue and must be treated as having an unrecorded top prize in this catalogue. The catalogue's treatment of max win ranges widely across titles elsewhere, from low hundreds to millions or ADJUSTED values, so the presence or absence of the figure matters when comparing titles.
When the catalogue records a max win the number is the canonical catalogue figure and is used below to compare session shapes. Where it is not published, the only authoritative source is the game's own info panel as provided by the studio or operator.
How hold-and-win and respin mechanics shape sessions: many small locks vs rare big resets
Mechanically, hold-and-win and respin features tend to change the distribution of wins in a session. They commonly produce a sequence of short respin rounds in which specific symbols are locked while players watch for additional collectors, bomb symbols or counters to fill a meter; this creates many small locked-symbol rounds that resolve quickly and a small chance of a large payout if many locks complete.
From a session management point of view that pattern implies frequent low-value events and occasional spikes, which aligns with the HIGH volatility labels recorded for some of these catalogue titles. The catalogue numbers that support that interpretation are the titles here that pair a respin or hold tag with HIGH volatility and a large published max win, for instance Zombie The Apocalypse (HIGH, max 10000x) and Zombie Knights (HIGH, max 9000x).
But the opposite can occur if a title pairs the mechanic with a modest max win and a lower volatility label; the catalogue contains examples where the mechanic exists but the recorded max win or volatility limits the spike size. In short, the presence of the mechanic changes session rhythm toward clustered respins and lock sequences, yet the numeric risk-return trade-off depends on the RTP, volatility label and published max win the catalogue records.
Comparing the hold-and-win subset to the wider catalogue feature counts
The catalogue-wide feature counts show what is common across the full 62-title catalogue, and that offers context for the hold-and-win group. Across all titles Free Spins appears 50 times and Wild appears 50 times; Scatter symbols appear 43 times. By contrast, 'Hold and Win' or explicit 'Respin' tags are rare: the computed MECHANICS block lists exactly eight titles with those tags.
Buy Feature appears 22 times across the full catalogue, Multiplier 24 times, and Sticky Wilds 12 times. Several of the eight hold-and-win/respin titles also include Buy Feature or Multiplier in their feature lists in the catalogue — for example Zombie The Apocalypse and Zombie Knights both list Buy Feature and Multiplier — which tends to amplify the volatility pattern already described.
The catalogue therefore shows that respin/hold mechanics are a minority design choice in this zombie catalogue, while Free Spins and conventional Wild/Scatter features dominate. That makes the respin group useful to study precisely because they are uncommon and numerically distinct in how sessions are likely to play out.
Concrete comparisons: Zombie The Apocalypse versus Zombie Rush by the catalogue numbers
Take two catalogue entries that both mention respins: Zombie The Apocalypse (id 44895) and Zombie Rush (id 3968). The catalogue lists Zombie The Apocalypse with RTP 96.03 %, volatility HIGH and max win 10000x; Zombie Rush is listed with RTP 94.89 %, volatility HIGH and max win 1500x.
Both titles carry the respin/hold mechanics tag in the catalogue, and both are recorded as HIGH volatility, but their max win figures differ by more than six times according to the catalogue. That numeric gap implies that, while both use respin-like rounds, Zombie The Apocalypse is catalogued with a far larger top-end payoff than Zombie Rush and thus a longer tail of rare large outcomes.
Readers should note these are catalogue numbers only; they do not describe art or audiovisual design and do not imply play-testing. The catalogue's RTP, volatility label and max win are the exact figures used here — they are not estimates.
What the catalogue does not record about the mechanics' specific rules
The catalogue lists feature tags such as Hold and Win, Respins, Respin Locking Win and similar, but it does not standardise or document the precise rule variants for each title. For example, the catalogue marks Zany Zombie Zlots with Hold and Win and Respins, and Zombie Expert Lock 2 Spin with Respin Locking Win, yet the catalogue does not record the exact counter sizes, symbol types, payout ladders or qualifying triggers involved.
That absence matters because 'hold-and-win' covers many studio-level variants: counter meters, collector symbols, coin grids, lock-and-respin windows, step multipliers and more. The catalogue simply flags which titles include some form of the mechanic without becoming a rulebook for how the mechanic is implemented in each game.
Consequently, if you need the authoritative description of how a specific respin or lock works, the game's own info panel supplied by the provider or the operator configuration is the only correct source. The catalogue is a starting map, not the fine print of each mechanic's rule set.
Practical takeaways for a session from the catalogue numbers in these eight titles
If you prefer sessions with frequent small events and a chance of a larger spike, the catalogue indicates hold-and-win and respin titles tend to produce that pattern. Many of the eight are tagged HIGH volatility in the catalogue and several carry large published max wins — Zombie The Apocalypse 10000x, Zombie Knights 9000x, Granny vs Zombies 5000x — which fits the frequent-small-versus-rare-large model described earlier.
Conversely, a respin label alone does not tell you the scale of the spike; consult the catalogue's max win and volatility fields where published. If a title in the subset shows not published for either RTP or max win, the catalogue cannot supply the numeric trade-off and the game's info panel must be consulted before drawing conclusions about expected session variance.
Finally, the catalogue shows these mechanics are uncommon relative to Free Spins and Wild features in this zombie collection. That rarity is why it is useful to check exactly which titles include hold-and-win or respin tags and then compare the catalogue-recorded RTP, volatility and max win before forming expectations about how a session will behave.
