Kings of Crystals II: King Millions Slot Review — RTP, Features & Where to Play

Kings of Crystals II: King Millions

All For One Studios · 2025

A 5×4 fantasy slot from All For One Studios on the King Millions progressive jackpot network. Three scatter types unlock Wild Power, Multiplier Power or Jackpot Power free-spin modes. A bonus wheel awards progressive jackpots (Mini through Huge) and cash prizes up to 100×. The grid expands to 5×6 in free spins, with a 10,000× max win. RTP is 90.5% — standard for progressive network slots where the jackpot pool adds expected value above the base rate.

About the game

Kings of Crystals II: King Millions is a 2025 fantasy slot from All For One Studios (formerly All41Studios), a Games Global exclusive label. It runs on the King Millions progressive network — a multi-game prize pool where a portion of every bet across all King Millions titles feeds shared jackpot tiers.

The grid is 5×4 in the base game with 40 paylines, expanding to 5×6 with 60 paylines when free spins trigger. Three distinct scatter symbols each unlock a different free-spin mode: Wild Power free spins feature stacked Wild reels covering 3 to 15 positions; Multiplier Power free spins apply win multipliers of 3× to 15× per spin; Jackpot Power free spins maximise access to the King Millions bonus wheel. Hourglass symbols extend the active spin count, and a symbol upgrade mechanic promotes lower-tier symbols to higher ones during the feature.

The King Millions bonus wheel spins during free spins and awards one of four progressive jackpot tiers — Mini, Minor, Major or Huge — or a cash multiplier between 7× and 100×. Because a portion of every wager funds the progressive pool, the published base RTP is 90.5%, lower than standard flat-prize Games Global titles but typical for jackpot network slots where the pool contribution adds expected value above the base figure.

Key features

5×4 grid expanding to 5×6 (60 paylines) during free spins; 40 paylines base
Three scatter types: Wild Power, Multiplier Power, Jackpot Power — each unlocks a different free-spin mode
King Millions bonus wheel: progressive jackpots (Mini, Minor, Major, Huge) + cash prizes 7×–100×
Wild reels (3–15 positions) and win multipliers (3×–15×)
Hourglass symbols award extra free spins
Symbol upgrade mechanic promotes lower-value symbols during free spins

Frequently asked questions

Why is the RTP only 90.5%?

Kings of Crystals II: King Millions feeds the King Millions progressive jackpot network. A portion of every bet goes into the shared prize pool, reducing the published base RTP to 90.5%. Progressive network slots typically show lower base RTPs for this reason; the jackpot pool contribution adds expected value above the base figure.

What are the three scatter types?

Wild Power scatters trigger free spins with stacked Wild reels (3–15 positions). Multiplier Power triggers free spins with 3×–15× win multipliers per spin. Jackpot Power triggers free spins with priority access to the King Millions bonus wheel.

What does the bonus wheel pay?

One of four progressive jackpot tiers (Mini, Minor, Major, Huge) or a cash multiplier between 7× and 100× bet.

What is the maximum win?

10,000× stake.

Is this slot legal to play in Ontario?

Yes — provided you play at an iGaming Ontario / AGCO-licensed operator. The casinos listed above are Ontario-licensed. Playing on unregulated international sites from within Ontario is not legal and offers no consumer protections.

Kings of Crystals II: King Millions

Quick facts

About the game

Key features

Screenshots

Where to play

Frequently asked questions

About the Expert: Andre Weston

Andre Weston | iGaming Industry Consultant