If you're trying to work out whether Twenty-One is worth your time, this hands-on review breaks it down. Built by Hacksaw Gaming, it lands as a release with a medium high volatility profile and 93.77% RTP. Visually it's built with crisp artwork and atmosphere, with the action running on 5 reels and 30 paylines. Originally released in 2023, it has aged well. Top wins are capped at 150,000x your stake, a genuinely massive ceiling for the patient. Let's break down what works and what doesn't.
Written by Daniel Chen · Last updated: January 2026
This slot game, Twenty-One, is the work of Hacksaw Gaming, given an engaging visual treatment. It runs on 5 reels and 30 paylines with medium high variance, and 93.77% RTP.
Its medium high variance balances steady wins with the odd larger payout. Overall it's a well-rounded slot game that knows what it is.
The RTP of 93.77% 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.
3.0 / 5 — Good
Twenty-One by Hacksaw Gaming is a solid offering that delivers good entertainment value. The 93.77% RTP combined with medium high volatility creates a well-balanced gaming experience.