Playtech

21 Duel Blackjack

Play 21 Duel Blackjack slot by Playtech for free in demo mode! Explore RTP, bonus rounds, and key features before playing for real.

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals, and it cannot be bought.

How this score is built

RTP

98.38%

return to player

Volatility

—

variance

Max win

20×

top multiplier

Min bet

$0.50

per spin

Reels

—

grid

Player rating

3.9 ★

13 votes

DEMO Play free, no signup

Playtech

Embed on your site

3.9 / 5

13 ratings

User ratings are shown separately from the Slot Score unless stated otherwise.

Five weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.

Payouts & RTP10/10

RTP 98.38% → 10.0/10

Volatilityn/a

not applicable

Win Potentialn/a

not applicable

Featuresn/a

not applicable

Game Mechanicsn/a

not applicable

Context signals (tie-breakers)

Layoutn/a

not applicable

Bet Flexibility6/10

0.5–100 (×200) → 6.0/10

Provider Reputation6.2/10

provider avg 6.2 → 6.2/10

Popularity2.5/10

synthetic proxy → 2.5/10

Popularity blends real player search demand (~30 markets) with a catalogue-derived proxy; games without measurable search demand use the proxy alone. Not live play telemetry.

Cite this score

SlotRanker Score: 77 — 21 Duel Blackjack by Playtech

https://slotranker.com/playtech/21-duel-blackjack#score

How to cite

Spec sheet

21 Duel Blackjack at a glance.

Identity

Slot name21 Duel Blackjack

StudioPlaytech

Released11/28/2018

Math

SlotRanker Score77

RTP98.38%

Max win20×

Bet range$0.50 – $100.00

Player rating3.9 / 5 · 13 votes

Format

Reels—

Paylines—

LayoutN-A

Expected average based on this slot's 98.38% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$3.24

Cost per session$3.24

Estimate only, for entertainment purposes — treat gambling as entertainment, not a way to make money, and set a budget you can afford to lose.

How long could a bankroll last on 21 Duel Blackjack? We simulate thousands of sessions from this game's published RTP and volatility — the long-run math, not a prediction of your next spin.

Bankroll ($)Bet per spin ($)Speed

Volatility tier: Mediumassumed — not published for this slot

Running simulation…

How this works

Each simulated spin either misses or returns a win drawn from a log-normal distribution, with the hit rate and spread set by the slot's volatility tier (Medium). The model is calibrated so the average return equals this slot's published RTP (98.38%), with wins capped at its top multiplier (20×).

This is a simplified, parametric model of the game's math — not its real paytable. It exists to make the house edge visible over many sessions, so the numbers above are averages across thousands of runs, never a forecast of one.

This is math, not a prediction. Real sessions vary wildly, and no strategy changes a game's built-in house edge. Play for fun, set limits, and never bet more than you can afford to lose.

Where to play 21 Duel Blackjack

No matching casinos for your region yet

Casino availability depends on where you play from. We only show casinos that accept players from your country.

Compare 21 Duel Blackjack with other games

	21 Duel Blackjack Score 77This game	Blackjack Pulse Time Score 85	Black Jack Score 85	European Blackjack MH Score 84	Premier Blackjack with Lucky Lucky Score 84
Identity
Studio	Playtech	Oi Studios	Wazdan	Play'n Go	Switch Studios
Released	11/28/2018	8/3/2026	11/28/2017	2/1/2015	11/25/2021
Math
RTP	98.38%	99.7%	99.9%	99.37%	99.57%
Volatility	—	High volatility	—	High volatility	Low volatility
Max win	20×	—	—	—	24,125×

Every number is shown as a delta against 21 Duel Blackjack.

Comparing against

21 Duel Blackjack

Playtech

RTP

98.38%

Max win

20×

Score

European Blackjack MH

Premier Blackjack with Lucky Lucky

Explore More Games with Similar RTP

	Provider	RTP	Volatility	Max win	Score
Supreme 777 Jackpots	Betsoft	97.86%	—	—	76
Hi Lo Blackjack	Realistic	97.92%	—	—	79
Blackjack (SabaPlay)	SabaPlay	98%	—	—	84
21 Duel Blackjack	Playtech	98.38%	—	20×	77
Blackjack VIP	Platipus Gaming	98.5%	—	4×	75
Blackjack Classic	OneTouch	98.65%	—	10×	80
6 in 1 Blackjack	Felt Gaming	98.76%	—	100×	80
Double Exposure 3 Hand	Habanero	98.8%	—	—	78
Brazilian Free Bet Blackjack	Pragmatic Play	98.9%	—	—	82
Zombie Blackjack	Bunfox	99.1%	—	3×	79
Bombay Blackjack	OneTouch	99.13%	—	—	80