Book Of Kingdoms vs Book of Oz Lock 'N Spin
Comparing Book Of Kingdoms (96.69% RTP) against Book of Oz Lock 'N Spin (96.60% RTP), Book Of Kingdoms carries a +0.09 percentage-point RTP advantage—reducing theoretical house cost by NZ$0.45 per 500 spins at a NZ$1 stake at Here2Win Casino.
Side-by-side technical & math comparison
| Parameter | Book Of Kingdoms | Book of Oz Lock 'N Spin |
|---|---|---|
| Studio | Pragmatic Play | Microgaming |
| Published RTP | 96.69% | 96.60% |
| House edge | 3.31% | 3.40% |
| Studio RTP rank | #40 / 580 | #60 / 640 |
| Volatility | Medium-to-high | High |
| Hit frequency | — | — |
| Reel grid | 5×3 classic video grid | 5×3 classic video grid |
| Pay structure | 10 paylines | 10 paylines |
| RNG testing labs | Gaming Laboratories International (GLI), Quinel, Gaming Associates | eCOGRA (co-founder), GLI |
| Studio licences | MGA, UKGC, AGCO (Ontario), Gibraltar | MGA, UKGC, AGCO (Ontario) |
100, 250 & 500-Spin Bankroll Projection (NZ$1 stake)
| Session volume | Total turnover | Book Of Kingdoms (Return / Cost) | Book of Oz Lock 'N Spin (Return / Cost) |
|---|---|---|---|
| 100 spins (NZ$1) | NZ$100 | NZ$96.69 (edge NZ$3.31) | NZ$96.60 (edge NZ$3.40) |
| 250 spins (NZ$1) | NZ$250 | NZ$241.72 (edge NZ$8.28) | NZ$241.50 (edge NZ$8.50) |
| 500 spins (NZ$1) | NZ$500 | NZ$483.45 (edge NZ$16.55) | NZ$483.00 (edge NZ$17.00) |
Questions
Which has a higher RTP: Book Of Kingdoms or Book of Oz Lock 'N Spin?
Book Of Kingdoms leads by +0.09 percentage points (96.69% on Book Of Kingdoms vs 96.60% on Book of Oz Lock 'N Spin).
How does volatility differ between Book Of Kingdoms and Book of Oz Lock 'N Spin?
Book Of Kingdoms runs on a Medium-to-high math profile, whereas Book of Oz Lock 'N Spin is rated High.
What is the expected 500-spin house cost at NZ$1 per spin?
Across 500 spins at NZ$1 (NZ$500 total turnover), the theoretical house margin is NZ$16.55 on Book Of Kingdoms compared to NZ$17.00 on Book of Oz Lock 'N Spin.
Are both Book Of Kingdoms and Book of Oz Lock 'N Spin RNG-certified and playable at Here2Win Casino?
Yes. Pragmatic Play (Gaming Laboratories International (GLI), Quinel, Gaming Associates) and Microgaming (eCOGRA (co-founder), GLI) are independently audited HTML5 studios available at Here2Win Casino.

