Our review of Primeval Rainforest cuts through the marketing and looks at what matters: how it plays and how it pays. Developed by KA Gaming, Primeval Rainforest arrives with very high volatility and 96.61% RTP. It first went live in 2018 and still earns its place today. It's wrapped in polished, characterful visuals and plays out on 20 paylines across 5 reels. Top wins are capped at 187,500x your stake, a genuinely massive ceiling for the patient. Let's break down what works and what doesn't.
Written by Daniel Chen · Last updated: March 2026
This game, Primeval Rainforest, is the work of KA Gaming, wrapped in polished, characterful visuals. It runs on a 5-reel grid running 20 paylines with very high variance, and a published RTP of 96.61%.
Where Primeval Rainforest earns its keep is the feature set. Look out for scatter symbols that unlock free spins and extra bonus rounds. With very high variance, this one is aimed at players who can ride out the swings for the top wins. On balance, Primeval Rainforest is a dependable option worth a few spins in the demo first.
With an RTP of 96.61%, this slot sits above the industry average of ~96%. Players can expect a solid return over extended play sessions, making it a good choice for value-conscious players.
Very high volatility delivers the most extreme payout profile — long dry spells punctuated by potentially massive wins. Only recommended for experienced players with substantial bankrolls and high risk tolerance.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Primeval Rainforest features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
3.0 / 5 — Good
Primeval Rainforest by KA Gaming is a solid offering that delivers good entertainment value. The 96.61% RTP combined with very high volatility creates a well-balanced gaming experience.