Curious what Koi Koi actually feels like to play? Here's our full, no-fluff take. Slot Factory are the software studio behind it, tuning the game for medium high volatility, with a published RTP of 94.02%. Top wins are capped at 5,000x your stake, a healthy ceiling worth chasing. It first went live in 2023 and still earns its place today. Visually it's wrapped in polished, characterful visuals, with the action running on a 5-reel grid running 10 paylines. So does it deliver? Let's get into it.
Written by Emma Roberts · Last updated: February 2026
At its core, Koi Koi is a title produced by Slot Factory, finished with a clean, modern look. It runs on 10 paylines across 5 reels with a medium high volatility profile, and a return-to-player rate of 94.02%.
Where Koi Koi earns its keep is the feature set. Look out for scatter symbols that unlock free spins and extra bonus rounds. Its medium high variance balances steady wins with the odd larger payout. All told, it's a solid entry in the Slot Factory catalogue.
The RTP of 94.02% is below the industry average of ~96%. This is common for older slots or those with special features. The lower RTP may be offset by unique mechanics or higher maximum win potential.
Medium-high volatility means wins come less frequently but tend to be larger when they hit. Players should be prepared for dry spells between bigger wins, requiring a moderate bankroll.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Koi Koi 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
Koi Koi by Slot Factory is a solid offering that delivers good entertainment value. The 94.02% RTP combined with medium high volatility creates a well-balanced gaming experience.