If you're trying to work out whether Costume Party is worth your time, this hands-on review breaks it down. Rival are the team behind it, tuning the title for a high-variance maths model, with a published RTP of 96.17%. You get 3 reels and 5 paylines, all wrapped in polished, characterful visuals. Originally released in 2019, it has aged well. If everything lines up, Costume Party can pay up to 81,000x your bet. But is it actually worth playing? Read on.
Written by Sophie Williams · Last updated: March 2026
At its core, Costume Party is a game produced by Rival. Presentation-wise it's finished with a clean, modern look, and it leans toward a high volatility profile at an RTP of 96.17%. Under the hood you'll find 3 reels and 5 paylines.
Where Costume Party earns its keep is the feature set. 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. On balance, Costume Party is a dependable option worth a few spins in the demo first.
The RTP of 96.17% is right around the industry average of ~96%. This represents a fair return that's in line with what most modern slots offer.
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.
Costume Party 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
Costume Party by Rival is a solid offering that delivers good entertainment value. The 96.17% RTP combined with high volatility creates a well-balanced gaming experience.