
bet365
Up to £30 in free bets after qualifying deposit
Trust Index 9.0/10 · 12h payout
Pragmatic Play · 2020Overview
Release the Kraken is a 5×4, 20-payline slot built around a sea-monster theme. The core mechanic: wilds stick to the reels and inch upward each spin, accumulating multipliers that trigger respins until they escape.
How it plays
Bet from £0.20 to £100 per spin on fixed 20 lines. Hits land regularly enough to keep sessions alive, but the high volatility means you'll chase long gaps between wins. Most of your return funnels through the free-spins feature and the climbing-wild respin mechanic.
The bonus round
Land three or more scatters to unlock free spins. During the bonus, wilds lock in place and trigger respins, climbing upward with a growing multiplier each step. The Kraken itself can appear to boost the multiplier, pushing winlines toward that 10,000x ceiling.
Who it's for
High-variance slot hunters who can sit through 50–100-spin droughts and want a mechanic where wilds do the heavy lifting. Suits players chasing big bonus multiplier payouts at £1–£10 stake.
Avoid if
You prefer consistent small hits or play for 20 minutes. Release the Kraken punishes impatient bankrolls and reward-hungry sessions.
Operators below carry Release the Kraken in their library and have a current Trust Index score. Claim links open the operator's verified welcome bonus.

bet365
Up to £30 in free bets after qualifying deposit
Trust Index 9.0/10 · 12h payout
LeoVegas
Up to £100 cash + 50 spins on Book of Dead
Trust Index 8.9/10 · 12h payout

William Hill
Bet £10 get £30 in free bets
Trust Index 8.6/10 · 24h payout

Sky Vegas
£10 free play on registration, no deposit required
Trust Index 8.4/10 · 24h payout

Ladbrokes
Bet £5 get £20 in free bets
Trust Index 8.3/10 · 24h payout
Wilds lock in place and move up one position per respin, multiplying the win by 1× each step. They keep climbing until no wilds land on the next spin. Respins are free.
The bonus can deliver up to 10,000× your stake if wilds climb high enough and land premium symbols. At £100 stake, that's a £1,000,000 ceiling — rare, but real.