Welcome to our deep dive on Number King — the demo, the maths, and whether it earns a spot in your rotation. This is a SimplePlay title, sitting firmly in the low variance bracket and paying back 95.82% RTP. Visually it's wrapped in polished, characterful visuals, with the action running on a 5-reel grid running 15 paylines. Originally released in 2025, it has aged well. The maximum win sits at 5,000x, so there's serious upside on the table. Here's how it stacks up.
Written by Michael Torres · Last updated: March 2026
This release, Number King, is the work of SimplePlay, given an engaging visual treatment and powered by a 5-reel grid running 15 paylines. The result is low variance paired with 95.82% RTP.
Thanks to its low variance, wins come often enough to suit casual, lower-risk play. Overall it's a well-rounded release that knows what it is.
At 95.82%, the RTP is slightly below the industry average of ~96%. While this is typical for many popular slots, players should be aware of the slightly lower theoretical return.
Low volatility means frequent small wins with less risk. This slot is ideal for players who prefer steady, consistent payouts and longer play sessions without dramatic bankroll swings.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
3.0 / 5 — Good
Number King by SimplePlay is a solid offering that delivers good entertainment value. The 95.82% RTP combined with low volatility creates a well-balanced gaming experience.