Sea of Thieves Free Play: September 2026 Dates and Guide

Sea of Thieves free play runs from 17 September 2026 at 15:00 UTC to 21 September at 17:00 UTC. In the UK, that is 16:00 on Thursday to 18:00 on Monday (BST). The game is free to install and play on supported platforms during this window. The announcement says Xbox Game Pass is not required for online participation.

Temporary access, not a free licence

This promotion does not permanently add ownership to your account. Check your connection speed and available storage before downloading. Wait for the free-play offer to appear on your platform’s store rather than leaving installation until the last hour.

How to play for free

1. Open the game’s store page on a supported platform.
2. Confirm the free-play offer is active for your account.
3. Download it and complete the store’s account, device and online-access requirements.
4. Plan time with your crew before the promotion ends.

The Game Pass waiver does not mean every platform has identical access conditions. If the offer is missing, do not complete a paid purchase assuming it is the free trial.

What is new in Season 21?

During Talk Like a Pirate Day, the Parley Pennant signals to nearby crews that you want to talk. The event also offers Parley Proficiency Sails tied to using the pennant. Check the in-game tasks; signing in alone does not unlock every reward.

Season 21 highlights Fight Nights, Bilge Rats Weekenders, Custom Seas improvements and refreshed seasonal progression rewards. The separate Microsoft Rewards sweepstakes applies only in its listed countries; it does not share the free-play promotion’s entire scope.

Playing after the free period

Afterwards, you may need a game licence or suitable subscription on your platform. Compare editions and storefront regions before buying. Browse Xbox Gift Cards for eligible Xbox purchases or PlayStation Gift Cards for eligible PlayStation purchases. These cards are optional shopping credit, not tickets to the free-play event.