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Mystery Drops
No longer available
This Grosvenor Casinos promotion has ended — we recorded it on 26 September 2026.
The end date stated by the operator has passed. The terms below are kept exactly as they were last published, because that is what people come here looking for. What is running today is further down this page.
“Mystery Drops” was a Grosvenor Casinos promotion in the UK, last seen on 26 September 2026. Existing customers aged 18 or over can opt in in-game and place a real-money bet of at least £1 on a participating game for randomly awarded cash drops. The promotion runs from 14 September 2026 at 01:01 UK time until 28 September 2026 at 00:59.
Running instead of this one
The same kind of offer — tournaments and prize draws in the same section — from operators still running them today.
| Promotion | Operator | Min. deposit | Wagering | Rating | Go |
|---|---|---|---|---|---|
| Win 1 of 5 Cash Prizes Worth £400 This September! |  Amazonslots | None | None | 5.4 | Get offer |
| Win a share of £25,000,000! |  Peachygames | None | None | 5.4 | Get offer |
| Daily Tournaments T&Cs |  Midnite | None | None | 5.3 | Get offer |
| Lucky Rush |  Meccabingo | None | None | 5.3 | Get offer |
| Rewards BURST! |  32red | None | None | 5.3 | Get offer |
Chosen by the published terms, the same way as everywhere else on this site — the method is here. 18+ · T&Cs apply.
Offer at a glance
| Offer type | Prize drop |
|---|---|
| You get | on Big Bass Splash, Big Bass Bonanza, Big Bass Vegas Double Down Deluxe, Big Bass Jackpot Bonanza: Big Bass It's a Whopper, Big Bass Football Bonanza, Fury of Anubis, Big Bass Jackpot Bonanza: Return to the Races, Big Bass Amazon Xtreme, Big Bass Secrets of the Golden Lake, Big Bass Jackpot Bonanza: Big Bass Hold & Spinner, Big Bass Blast, Big Bass Boxing Bonus Round, Buffalo King Megaways, Bigger Bass Bonanza, Sugar Rush Super Scatter “Cash drops will be automatically paid out on any random spin on any of the participating games during the promo period. Qualifying/participating games: Big Bass Splash Big Bass Bonanza Big Bass Vegas Double Down Deluxe Big Bass Jackpot Bonanza: Big Bass It's a Whopper Big Bass Football Bonanza Fury of Anubis Big Bass Jackpot Bonanza: Return to the Races Big Bass Amazon Xtreme Big Bass Secrets of the Golden Lake Big Bass Jackpot Bonanza: Big Bass Hold & Spinner Big Bass Blast Big Bass Boxing Bonus Round Buffalo King Megaways Bigger Bass Bonanza Sugar Rush Super Scatter” |
| To qualify | Place bet £1 on Big Bass Splash, Big Bass Bonanza, Big Bass Vegas Double Down Deluxe, Big Bass Jackpot Bonanza: Big Bass It's a Whopper, Big Bass Football Bonanza, Fury of Anubis, Big Bass Jackpot Bonanza: Return to the Races, Big Bass Amazon Xtreme, Big Bass Secrets of the Golden Lake, Big Bass Jackpot Bonanza: Big Bass Hold & Spinner, Big Bass Blast, Big Bass Boxing Bonus Round, Buffalo King Megaways, Bigger Bass Bonanza, Sugar Rush Super Scatter “To take part in this promotion players must opt in (in-game) on any of the participating games and must place real money bet with a minimum stake of £1 on the participating game. Cash drops will be automatically paid out on any random spin on any of the participating games during the promo period. Qualifying/participating games: Big Bass Splash Big Bass Bonanza Big Bass Vegas Double Down Deluxe Big Bass Jackpot Bonanza: Big Bass It's a Whopper Big Bass Football Bonanza Fury of Anubis Big Bass Jackpot Bonanza: Return to the Races Big Bass Amazon Xtreme Big Bass Secrets of the Golden Lake Big Bass Jackpot Bonanza: Big Bass Hold & Spinner Big Bass Blast Big Bass Boxing Bonus Round Buffalo King Megaways Bigger Bass Bonanza Sugar Rush Super Scatter” |
| Opt-in | Required — in-game “players must opt in (in-game) on any of the participating games” |
| Winnings paid as | Cash “Cash prizes drop at random” |
| Prize pool | £5000 “Your share of £5,000 each week” |
| Minimum bet | £1 “minimum stake of £1” |
| Who can claim | Existing customers “existing customers of GrosvenorCasinos.com who are aged 18 years & over” |
| Minimum age | 18+ “aged 18 years & over” |
| Runs | 2026-09-14T01:01 – 2026-09-28T00:59 “The promotion will run from 14th September 2026 01:01 UK time until 00:59 on 28th September 2026” |
| Combining | Cannot be used with other promotions “This offer is not available in conjunction with any other offer.” |
| Internet required | Yes “access to the internet is required to enter the Promotion and to claim a prize” |
| Prize pool frequency | each week “Your share of £5,000 each week” |
Stake £1 on selected games for a shot at a prize drop 18+ · T&Cs apply.
Full terms from Grosvenor Casinos: general promotion terms
Public offer as published by Grosvenor Casinos. Affiliate-exclusive offers may differ. Every value above is quoted from that page.
What is good and what is not
Worth knowing
- Opt-in required
Both lists are built from the operator’s own wording, shown in full further down this page. Nothing here is an opinion about the operator.
How this compares with other tournaments and prize draws
Same kind of offer, same section, other operators — by the numbers each operator publishes. The rating is worked out the same way for every row (method).
| Operator | Promotion | Min. deposit | Wagering | Rating | Go |
|---|---|---|---|---|---|
 Grosvenor Casinos | This offer | None | — | 3.2 | — |
| Amazonslots | Win 1 of 5 Cash Prizes Worth £400 This September! | None | None | 5.4 | Get offer |
| Peachygames | Win a share of £25,000,000! | None | None | 5.4 | Get offer |
| Midnite | Daily Tournaments T&Cs | None | None | 5.3 | Get offer |
| Meccabingo | Lucky Rush | None | None | 5.3 | Get offer |
| 32red | Rewards BURST! | None | None | 5.3 | Get offer |
Key facts, as last seen
- “Mystery Drops” at Grosvenor Casinos runs from 14 September 2026 to 28 September 2026.
Details
| Operator | Grosvenor Casinos |
|---|---|
| Country | United Kingdom |
| Featured on promotions page | Yes |
| Runs | 14 September 2026 – 28 September 2026 |
| First seen | 23 September 2026 |
| Last seen | 26 September 2026 |
| Ended | 26 September 2026 |
| Source | www.grosvenorcasinos.com |
Original page on www.grosvenorcasinos.com (may no longer be available)
History
This promotion was first listed on 23 September 2026; the operator’s page was last checked on 26 September 2026. The wording of the offer last changed on 29 September 2026.
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