Curious what Cosmic Heart actually feels like to play? Here's our full, no-fluff take. Developed by High 5 Games, Cosmic Heart arrives with a high-variance maths model and a published RTP of 95.93%. You get 40 paylines across 5 reels, all built with crisp artwork and atmosphere. Top wins are capped at 5,000x your stake, a healthy ceiling worth chasing. The full verdict is below.
Written by Rachel Kim · Last updated: January 2026
At its core, Cosmic Heart is a release produced by High 5 Games, wrapped in polished, characterful visuals. It runs on 40 paylines across 5 reels with a high-variance maths model, and a published RTP of 95.93%.
Dig into the bonuses and Cosmic Heart starts to stand out. Look out for scatter symbols that unlock free spins and extra bonus rounds. The high volatility means patience is rewarded — expect quiet spells broken by bigger hits. All told, it's a solid entry in the High 5 Games catalogue.
At 95.93%, 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.
High volatility means longer gaps between wins, but when wins do land, they can be significantly larger. A bigger bankroll and patience are recommended for this type of slot.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Cosmic Heart 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
Cosmic Heart by High 5 Games is a solid offering that delivers good entertainment value. The 95.93% RTP combined with high volatility creates a well-balanced gaming experience.