Join the Monster Catch Leaderboard at Watchmyspin for a chance to win up to 500 Free Spins on Big Bass Halloween. The competition runs until 3 November 2025 at 23:59 GMT.
UK players can enter by depositing at least £10 with the code HALLOWEEN and spinning the selected Halloween slots to rank among the top three.
➡️ CLICK HERE TO SEE THE OFFER
The prize distribution is as follows:
| Rank | Prize |
|---|---|
| 1 | 500 Free Spins on Big Bass Halloween |
| 2 | 250 Free Spins on Big Bass Halloween |
| 3 | 150 Free Spins on Big Bass Halloween |
The total 900 free spins will be shared between the three winners, with prizes credited within seven days after the promotion ends. Winnings from free spins must be wagered 50 times within seven days, and only real money bets count towards the wagering.
Note that deposits made via Skrill and Neteller do not qualify for the promotion, and withdrawals will void any active bonuses. Players should use familiar UK payment methods such as faster payments when making their deposit to ensure eligibility.
To qualify, players must deposit using the casino cashier and enter the code HALLOWEEN. Jackpot games do not contribute to the wagering requirement.
If you want to start spinning without any initial deposit, take a look at our page where you can check out 5 free spins no deposit offers suitable for UK players.
For a detailed understanding of this platform, read our take a look at the Watchmyspin review to see how it compares within the UK market and what unique features it offers.
🎯 Mr. Gamble EXPERT TAKE
This promotion from Watchmyspin is a leaderboard style comp where you compete with other players by wagering on specific Halloween slots. The top 3 players with the highest wagers get a big chunk of free spins on Big Bass Halloween, with the top prize being 500 free spins. You’ve got to deposit at least £10 with the code HALLOWEEN to join, then spin away on the qualifying games.
Leaderboard promos like this aren’t unusual in the UK market. Typically, you see giveaways of free spins or bonus cash for landing in the top spots. Some offer flat free spins for all entries but here, only the highest 3 wagerers get the big wins. The wagering on your stakes to rank at the top is pretty intense since you’re racing against everyone else before the deadline on 3rd November.
What’s quite on trend is the Halloween theme, which adds a bit of seasonal fun and ties in with a popular slot. Using a specific code and a set of slots for leaderboard qualification is common, but worth checking since this promo actively excludes bets on progressives. So if you like chasing jackpots, this one won’t count those towards your rank.
Comparing this to the Slots52 PRO offer, Watchmyspin’s leaderboard is more of a competitive event rather than a straight bonus. Slots52 lets you spin a mega reel for free spins after a £20 deposit and you get between 50 and 500 free spins straight away on popular games like Starburst and Fluffy Favourites. Slots52 also allows you to use their code weekly, offering a steady chance at spins.
The Watchmyspin promo requires quite a bit more ongoing betting to win since you need to be in the top wagerers by the deadline, not just make one deposit. Plus, the free spins at Watchmyspin come with a 50x wagering requirement on any winnings, which is quite steep compared to Slots52’s usually lower wagering demands. Slots52 also excludes Skrill and Neteller deposits like Watchmyspin but Watchmyspin’s minimum deposit to enter is lower at £10.
If you want to see a detailed comparison, click here to see the Slots52 offer. It might give you an idea if you prefer a straightforward bonus or a competitive leaderboard style play.
This leaderboard is good for players who enjoy a bit of competition and don’t mind putting down quite a bit of cash in bets during the promo period. If you’re not planning to wager heavily or prefer smaller, easier bonuses, this could be frustrating. The high 50x wagering on free spins winnings also makes it tougher to clear compared to many other free spin bonuses.
Also, be aware that withdrawing your money cancels any active bonuses, and unused free spins or winnings expire after 7 days. So you’ll need to be ready to play consistently and meet the wagering to avoid losing out. Overall, if you’re chasing lots of free spins on a Halloween game and like leaderboard contests, this might be worth a shot. Otherwise, simpler promos with easier wagering could be a better bet.