The Big Sunday Blast is a Network Tournament Series organised by Playson and Booongo, running every Sunday from December 7, 2025, at 02:00 UTC to May 31, 2026, at 23:59 UTC.

The total prize pool of each tournament in the series is 25,000 EUR (or the player's currency equivalent).

The series includes 26 tournaments:

07.12.2025 02:00 UTC – 07.12.2025 23:59 UTC

14.12.2025 02:00 UTC – 14.12.2025 23:59 UTC

21.12.2025 02:00 UTC – 21.12.2025 23:59 UTC

28.12.2025 02:00 UTC – 28.12.2025 23:59 UTC

04.01.2026 02:00 UTC – 04.01.2026 23:59 UTC

11.01.2026 02:00 UTC – 11.01.2026 23:59 UTC

18.01.2026 02:00 UTC – 18.01.2026 23:59 UTC

25.01.2026 02:00 UTC – 25.01.2026 23:59 UTC

01.02.2026 02:00 UTC – 01.02.2026 23:59 UTC

08.02.2026 02:00 UTC – 08.02.2026 23:59 UTC

15.02.2026 02:00 UTC – 15.02.2026 23:59 UTC

22.02.2026 02:00 UTC – 22.02.2026 23:59 UTC

01.03.2026 02:00 UTC – 01.03.2026 23:59 UTC

08.03.2026 02:00 UTC – 08.03.2026 23:59 UTC

15.03.2026 02:00 UTC – 15.03.2026 23:59 UTC

22.03.2026 02:00 UTC – 22.03.2026 23:59 UTC

29.03.2026 02:00 UTC – 29.03.2026 23:59 UTC

05.04.2026 02:00 UTC – 05.04.2026 23:59 UTC

12.04.2026 02:00 UTC – 12.04.2026 23:59 UTC

19.04.2026 02:00 UTC – 19.04.2026 23:59 UTC

26.04.2026 02:00 UTC – 26.04.2026 23:59 UTC

03.05.2026 02:00 UTC – 03.05.2026 23:59 UTC

10.05.2026 02:00 UTC – 10.05.2026 23:59 UTC

17.05.2026 02:00 UTC – 17.05.2026 23:59 UTC

24.05.2026 02:00 UTC – 24.05.2026 23:59 UTC

31.05.2026 02:00 UTC – 31.05.2026 23:59 UTC

The base currency of the tournament is EUR, but players can participate using any available currency.

Prize Distribution per tournament:

1st place – 3,500 EUR

2nd place – 3,000 EUR

3rd place – 2,500 EUR

4th place – 2,000 EUR

5th place – 1,000 EUR

6th to 10th place – 300 EUR each

11th to 20th place – 200 EUR each

21st to 50th place – 100 EUR each

51st to 125th place – 70 EUR each

126th to 150th place – 50 EUR each

The minimum bet required to participate is 0.50 EUR.

To qualify and be eligible to claim a prize, the player must complete at least 100 spins during the tournament period.

All points collected during the qualification stage are retained and counted once the player qualifies.

Non-qualified players are also shown on the leaderboard, but displayed in grey until they qualify.

Scoring (Winning Mechanic): HIGHEST SINGLE ROUND MULTIPLIER (HSRM).

Only the highest win multiplier (win-to-bet ratio) achieved in a single spin is considered. For example, if the bet is 2 EUR and the win is 50 EUR, the player receives 25 points. This score remains until a higher multiplier occurs.

The leaderboard is updated in real-time for each spin. If no player action is registered, stats sync every 10 seconds between the game and promo servers.

A 5-minute delay is applied at the end of each tournament for final result verification. During this time, the leaderboard is shown in a stripped view for data integrity.

If two or more players finish the tournament with the same number of points, the player who reached that score first will be ranked higher.

Only real money and bonus balance rounds are eligible for this tournament. Free spins do not count towards the tournament.

Other than the price of a spin, there is no additional cost to enter the tournament.

Each player is assigned a personal tournament ID for the leaderboard.

Only qualified players are eligible to claim prizes.

Participating games: All games by Playson and Booongo.

Tournament rules can be changed at any time.

Malfunction voids all payouts.

By participating in the tournament, you agree to the Terms and Conditions outlined here and the ones provided by Oshi.

Oshi holds the right to cancel the tournament for an indefinite term without any payments according to the leaderboard in cases of emergency.