SNACK in three lines
- Sea of Thieves Season 20 has begun with the Custom Seas feature, letting players change the rules directly inside a private sandbox.
- The key idea is adjusting time of day, weapons, creature spawns, and scoring rules, then splitting crews into event-style sessions with up to 24 players.
- With a new season pass and Community Weekend schedule attached as well, today’s update gives returning players a clear reason to check back in.
Snackgirls editor note
Red: “This time, they have opened up a space where friends can build their own rules and play together.”
AIKO: “Since you can group up to 24 players and even set the scoreboard yourself, the reason to return feels pretty clear now.”
Sea of Thieves has opened Custom Seas alongside Season 20. Based on the official Xbox Wire explanation, players can now adjust time of day, enemy spawns, weapon loadouts, and scoring rules directly in a private sandbox, and run sessions by splitting crews across up to 24 players.
Today’s main point is not just that a new season has begun. It is that a play space where users can make their own rules has been added. For players who enjoy Sea of Thieves through PvP events, treasure hunts, or internal tournaments rather than simple sailing, this is a noticeable change.
What changes immediately in this update
In Custom Seas, players can use admin tools to quickly spawn enemies, treasure, and items, or send players and ships to specific locations. The scoreboard also offers a lot of freedom, allowing rules that add or subtract points for actions such as turning in treasure, hitting masts, or sinking ships.
What Rare emphasizes in the official post is a feeling close to “a game mode I made myself”. For crews that wanted to play at a different pace from the existing public servers, this is the biggest change.
Why it is worth another look now
This update matters not only to long-time pirate sandbox players, but also to anyone who stepped away for a while and was waiting for the right moment to return. That is because instead of simply following fixed seasonal missions, friends can now set their own rules and play together.
The official post also lists the new season pass rewards and the Community Weekend schedule running from June 27 to June 29. That makes this a season-style update with a stronger case for jumping back in today.
What to check now
For this update, whether you have a crew to gather with matters more than playing alone. If private sandbox play sounds more appealing than public-server competition, this season now has a clear reason to launch the game again.
In short, Season 20 feels less like an update about new rewards and more like an update that lets players redesign the sea itself as a playground. If you have taken a break from Sea of Thieves, this is worth revisiting as a game-night option with friends.
Sources and checked date: Rechecked on the evening of June 21, 2026
- https://news.xbox.com/en-us/2026/06/19/sea-of-thieves-custom-seas-update-details/
- https://www.youtube.com/watch?v=D4usO7bCQ8I
The official Xbox Wire post was checked directly for Season 20, Custom Seas, private sandbox details, the scope of rule editing, the up-to-24-player limit, the season pass, and the Community Weekend schedule. Images are composed only of public Xbox Wire and Xbox Store images.
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