LeoVegas
Up to £100 cash + 50 spins on Book of Dead
Trust Index 8.9/10 · 12h payout
Play'n GO · 2017Overview
Reactoonz is Play'n GO's cluster-pays oddity — forget paylines entirely. Match 5+ identical symbols in a cluster anywhere on the 7×7 grid and they detonate. Winning symbols vanish, new ones drop down (tumble), and chains keep firing as long as matches keep landing.
How it plays
Bet £0.20 to £100 per spin. Hit feel is snappy but brutal — long droughts are common, then three tumbles in a row land and you're suddenly £40 up. The math sits in high volatility. Smaller wins cluster around 2–5x stake; the 4,570x top is real but rare.
The bonus round
There is no separate bonus round. Instead, land wild symbols (the goofy alien faces) during base play and they expand to fill entire rows or columns, creating mega-clusters. The wild multiplier mechanic is where the big money lives — stack enough and a single tumble chain can vault you toward the ceiling.
Who it's for
High-volatility chasers who enjoy grid-based mechanics and don't mind waiting 150+ spins between solid hits. Suits players with a session bank and patience for the tumble churn.
Avoid if
You chase steady 2–3x returns or play on a tight session budget — Reactoonz eats single-digit stakes fast and offers little middle ground.
Operators below carry Reactoonz in their library and have a current Trust Index score. Claim links open the operator's verified welcome bonus.
LeoVegas
Up to £100 cash + 50 spins on Book of Dead
Trust Index 8.9/10 · 12h payout

Mr Green
100% up to £100 + 200 free spins
Trust Index 8.7/10 · 24h payout

Casumo
100% up to £25 + 20 free spins
Trust Index 8.3/10 · 12h payout

PlayOJO
50 wager-free spins on Book of Dead, winnings paid as cash
Trust Index 8.8/10 · 8h payout
Match 5+ identical symbols adjacent horizontally or vertically. They explode, symbols drop, and new clusters form. Chains continue until no fresh matches land. Tumbles can run 5–6 times in a single spin.
Alien wilds expand to fill rows or columns and attach multipliers (2x, 3x, up to 5x). Stack them during a tumble chain and your payout scales exponentially — the route to 4,570x.