The tournament runs every Sunday from September 7, 2025, to November 30, 2025.

Each tournament has a prize pool of 20,000 EUR (or the player's currency equivalent).

The Big Sunday Blast is divided into 13 tournaments as follows:

September 7, 2025, 2:00 UTC to 23:59 UTC

September 14, 2025, 2:00 UTC to 23:59 UTC

September 21, 2025, 2:00 UTC to 23:59 UTC

September 28, 2025, 2:00 UTC to 23:59 UTC

October 5, 2025, 2:00 UTC to 23:59 UTC

October 12, 2025, 2:00 UTC to 23:59 UTC

October 19, 2025, 2:00 UTC to 23:59 UTC

October 26, 2025, 2:00 UTC to 23:59 UTC

November 2, 2025, 2:00 UTC to 23:59 UTC

November 9, 2025, 2:00 UTC to 23:59 UTC

November 16, 2025, 2:00 UTC to 23:59 UTC

November 23, 2025, 2:00 UTC to 23:59 UTC

November 30, 2025, 2:00 UTC to 23:59 UTC

Prize Distribution

In each tournament there are 125 prize positions. Prize distribution is: 1st place – 3,000 EUR, 2nd – 2,500 EUR, 3rd – 2,000 EUR, 4th – 1,500 EUR, 5th – 750 EUR, 6th to 10th – 300 EUR, 11th to 20th – 200 EUR, 21st to 50th – 100 EUR, 51st to 125th – 50 EUR.

The scoring mechanic

Players get points based on the Highest Single Round Multiplier.

Only the highest win multiplier (win-to-bet ratio) is considered.

Example: bet 2 EUR and win 50 EUR = x25 multiplier → 25 points.

This score remains until the player achieves a higher multiplier.

Qualification

To be qualified and have the right to claim the prize, a player must fulfill the following conditions:

1) Minimum bet is 0.50 EUR

2) Minimum number of spins is 100

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

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

General Terms

Only real money and bonus money rounds (excluding free spins) qualify for the tournament.

Apart from the cost of spins, there are no extra fees to enter the tournament.

Each player will get a personal tournament ID for the leaderboard.

If two or more players are tied, the player who achieved the score earlier will be ranked higher.

The leaderboard is updated in real time.

With auto-payout enabled, prizes are credited automatically to winners who received the Win Pop-up after the tournament ends and results are final.

To trigger the payout, players must make 1 spin in any Playson or Booongo game after the tournament is over.

If auto-payout is unavailable due to technical issues, Oshi Casino will credit prizes manually based on the Winners Report.

Oshi Casino reserves the right to void scores or withhold prizes due to errors, technical faults, or cheating.

The Casino can amend or cancel the tournament at any time.

Tournament rules can be changed anytime. Malfunction voids all payouts.

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