Stack 'Em (Hacksaw Gaming) RTP review: 96.20% (configurable)
Skip if: unpublished lower builds bother you; SlotCatalog confirms ranges exist without naming them
Stack 'Em is the cleanest expression of Hacksaw's neon-abstract phase, and our advice is straightforward: play it if readable math is what you want from a cluster game, pass if you need a theme with a pulse. On its 5x6 grid, stacked symbols drive cluster wins while per-reel multipliers combine by simple addition — up to 30x on a single spin — and the bonus round swaps that for a global progressive multiplier that carries the 10,000x ceiling. Compared with the 2,048x caps of the studio's earlier minimal grids, that ceiling was the 2021 upgrade that made the formula worth revisiting.
Addition in the base, escalation in the bonus
The two-phase multiplier design gives the game its shape. During regular play, each reel can contribute its own multiplier to a win, and because they sum, you can literally read the maximum possible outcome off the header before a cascade resolves. The free spins replace this with a single global value that ratchets as the round progresses — the compounding phase where serious results happen. Cascading re-drops keep base sessions from going silent, which is why this plays a notch below the studio's 5/5 extremes like Chaos Crew despite sharing its cap; the 129x bonus buy (absent in Great Britain, per UK rules) jumps the queue to the progressive phase.
A firm headline over a foggy ladder
The 96.20% default is solidly documented via SlotCatalog. What is not documented: the lower rungs — the listing flags "RTP Ranges" without publishing figures, in line with the studio's configurable practice. Practically, that shifts all verification onto the game client itself. The paytable's stated percentage is the only number that binds your session; if it reads below 96.20%, you have found one of the phantom builds, and better tables exist elsewhere.
Against its own family
Two in-house comparisons frame it well. Stick 'Em, its near-namesake from the same year, is the casual cousin — respin-based, 2,048x roof, no buy at all. Hand of Anubis is the ambitious one, where multiplier growth depends on orbs surviving cascades rather than fixed reel positions. Stack 'Em sits deliberately between: more ceiling than the former, less chaos than the latter, and the most transparent arithmetic of the three.
| Slot | Provider | RTP | Volatility | Max win |
|---|---|---|---|---|
| Stack 'Em (this slot) | Hacksaw Gaming | 96.20% | High | 10,000x |
| Wanted Dead or a Wild | Hacksaw Gaming | 96.38% | High | 12,500x |
| Le Bandit | Hacksaw Gaming | 96.34% | Medium | 10,000x |
| Hand of Anubis | Hacksaw Gaming | 96.24% | High | 10,000x |
| Chaos Crew | Hacksaw Gaming | 96.30% | High | 10,000x |
Closing count
3.5 out of 5 — a fair mark for a game whose virtues are structural rather than spectacular. The summed-multiplier system rewards attention, the progressive bonus provides a real destination, and the only meaningful knock is a headline slightly under the studio's front-runners plus that unpublished ladder. Confirm the figure in-game and it does exactly what it advertises.