21 Casino Review (2025) - 5,000+ Casino Games

21 Casino is a long-standing White Hat Gaming brand with more than a decade of industry experience.

Their offering certainly stands out, combining a generous deposit-match welcome bonus with a 5,000-strong games library and an innovative VIP program.

My comprehensive review will take a closer look at all aspects of this casino site - highlighting the positives, while not shying away from any negatives.

21 Casino is owned and operated by White Hat Gaming, one of UK's most prolific casino operators.

They are regulated and licensed by the UK Gambling Commission - licence no. 52894.

This operator currently runs more than 40 UK online casinos, including 666 Casino, Casilando and Playzee.

New players at 21 Casino can claim a welcome bonus offering a 100 real money spins on Book of Dead.

21 Casino Promo Code

You don't require a promo code to claim this bonus.

How It Works

• Opt-in through the 'Promotions' page
• Deposit a minimum of £15
• Receive 100 Book of Dead cash spins
• Spins must be used within 10 days
• Winnings from spins are credited as cash funds and capped at £100
• Cash funds are immediately withdrawable
• Affordability checks apply

Wagering Requirements

This bonus has no wagering requirements.

The only game included in this bonus is Book of Dead.

The free spins must be wagered within 10 days.

Is the 21 Casino Bonus Worth It?

While not as generous as some other bonuses in the UK, this bonus is wager-free, and cash funds can be withdrawn straight away. That said, the free spins are only available on one slot game.

Key Benefits:

✔️ Low Minimum Deposit - Depositing just £15 will make you eligible to receive this bonus

✔️ No Wagering Requirements - New players will receive their free spins bonus as soon as they deposit

Who Is This Bonus Best For?

✔️ This bonus is great for slots players who love adventure games.

21 Casino does not currently any ongoing promotions for existing players.

When you visit their Promotions page, all you will find is a link to their welcome bonus.

More positively, they do offer a VIP program - 21 Suite.

This scheme has four different tiers - Silver, Gold, Platinum and Diamond.

You will ascend up through the tiers based on your account activity, earning exclusive rewards like a personal VIP account manager, faster withdrawals, weekly personalised offers, birthday gifts, higher withdrawal limits and exclusive tournaments for top-tier members.

21 Casino accepts a wide range of payment methods, including debit cards, Apple Pay, PayPal, Neteller, Skrill and instant bank transfers.

When it comes to withdrawal times, e-wallets are the fastest option, with payouts typically processed within 24 hours.

Debit cards and bank transfer withdrawals can take a lot longer, up to five business days.

Any new online casino players will need to complete a KYC process when they join this casino.

In order to do this, you will need to provide the casino with a proof of identity and proof of address.

When I was reviewing the casino, I tested the process for myself. My account was verified within 24 hours of supplying them with the required documents.

21 Casino offers an impressive library of 5,000+ casino games.

Diverse Slots Library

This casino site offers a large and varied slots library that offers thousands and thousands of top slots.

Their dedicated slots section is neatly divided into a number of sub-categories - those being 'Megaways', 'Buy Feature', 'Cluster Pays', 'Mega Symbols (3x)' and 'Sticky Wilds'.

They really do have all bases covered with their selection covering all the classic favourites, as well as brand-new slot releases.

Premium Jackpot Slots

Their selection of progressive jackpot slots is seriously impressive, with 200+ jackpot slots featured on-site.

The quality here is exceptional, with the titles provided by top industry jackpot pools from Jackpot King, King Millions, Mega Moolah and WowPot.

Limited Live Casino

They offer a relatively modest live casino with 50+ live dealer tables. 

While the quantity may be limited compared to some competitors, the quality is excellent, with all tables provided by industry heavyweights Evolution Gaming and Pragmatic Play Live.

Dozens of Classic Table Games

Any players who prefer classic RNG table games are also very well treated here, with 100+ classic casino games available.

The majority of this collection is made up of the usual mix of blackjack and roulette variants, but you will also find rarer titles like baccarat, solitaire and video poker.

Play a Random Game

I really enjoyed their innovative 'Play a Random Game' feature.

Clicking the button triggers a spin that lands on a completely random game, giving you the option to try it out or spin again.

It’s a fun, unique addition that encourages players to step outside their usual favourites and discover something new.

21 Casino offers a mobile casino app that is available to download on both iOS and Android devices.

Both versions of the app have received hundreds of reviews:

• App Store - 4.5* (400+ reviews)
• Google Play Store - 3.6* (320+ reviews)

Although most of the app reviews are a few years old, the positive feedback consistently highlights strong overall performance and a wide selection of games. On the other hand, the negative reviews largely centre on slower withdrawal times and the typical frustrations associated with losing money.