Mystery Jack vs Space Spins
Comparing Mystery Jack (96.79% RTP) against Space Spins (96.66% RTP), Mystery Jack carries a +0.13 percentage-point RTP advantage—reducing theoretical house cost by A$0.65 per 500 spins at a A$1 stake at Here2Win Casino.
Side-by-side technical & math comparison
| Parameter | Mystery Jack | Space Spins |
|---|---|---|
| Studio | VoltEnt | VoltEnt |
| Published RTP | 96.79% | 96.66% |
| House edge | 3.21% | 3.34% |
| Studio RTP rank | #2 / 332 | #4 / 332 |
| Volatility | Medium | Low-to-medium |
| Hit frequency | 21.19% | 24.10% |
| Reel grid | 5×3 / 5×4 HTML5 video grid | 5×3 / 5×4 HTML5 video grid |
| Pay structure | Standard studio payline / ways structure | Standard studio payline / ways structure |
| RNG testing labs | GLI, NMi | GLI, NMi |
| Studio licences | MGA, UKGC, AGCO (Ontario), Spelinspektionen, ONJN | MGA, UKGC, AGCO (Ontario), Spelinspektionen, ONJN |
100, 250 & 500-Spin Bankroll Projection (A$1 stake)
| Session volume | Total turnover | Mystery Jack (Return / Cost) | Space Spins (Return / Cost) |
|---|---|---|---|
| 100 spins (A$1) | A$100 | A$96.79 (edge A$3.21) | A$96.66 (edge A$3.34) |
| 250 spins (A$1) | A$250 | A$241.97 (edge A$8.02) | A$241.65 (edge A$8.35) |
| 500 spins (A$1) | A$500 | A$483.95 (edge A$16.05) | A$483.30 (edge A$16.70) |
Questions
Which has a higher RTP: Mystery Jack or Space Spins?
Mystery Jack leads by +0.13 percentage points (96.79% on Mystery Jack vs 96.66% on Space Spins).
How does volatility differ between Mystery Jack and Space Spins?
Mystery Jack runs on a Medium math profile, whereas Space Spins is rated Low-to-medium.
What is the expected 500-spin house cost at A$1 per spin?
Across 500 spins at A$1 (A$500 total turnover), the theoretical house margin is A$16.05 on Mystery Jack compared to A$16.70 on Space Spins.
Are both Mystery Jack and Space Spins RNG-certified and playable at Here2Win Casino?
Yes. VoltEnt (GLI, NMi) and VoltEnt (GLI, NMi) are independently audited HTML5 studios available at Here2Win Casino.

