Our review of BlackJack 21 cuts through the marketing and looks at what matters: how it plays and how it pays. Advantplay are the developer behind it, tuning the game for a medium low volatility profile, with 97.03% RTP. It's leaning into a vegas aesthetic and plays out on 15 paylines across 5 reels. Top wins are capped at 5,000x your stake, a healthy ceiling worth chasing. Let's break down what works and what doesn't.
Written by Alex Crawford · Last updated: January 2026
BlackJack 21 is a slot game from Advantplay. Presentation-wise it's wrapped in a vegas theme, and it leans toward medium low volatility at an RTP of 97.03%. Under the hood you'll find a 5-reel grid running 15 paylines.
Where BlackJack 21 earns its keep is the feature set. Look out for scatter symbols that unlock free spins and extra bonus rounds. The medium low volatility makes it forgiving on the bankroll, ideal for relaxed, longer sessions. On balance, BlackJack 21 is a dependable option worth a few spins in the demo first.
At 97.03%, this slot offers an excellent return to player rate, well above the industry average of ~96%. This makes it one of the more generous slots available in terms of long-term payout potential.
Medium-low volatility offers a good balance of regular wins with occasional larger payouts. Expect frequent hits with modest amounts, suitable for casual players who want low-risk entertainment.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
BlackJack 21 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
BlackJack 21 by Advantplay is a solid offering that delivers good entertainment value. The 97.03% RTP combined with medium low volatility creates a well-balanced gaming experience.