The Grand Tour is a quest that started in Pre-Alpha release 10 and has continued with each release ever since. In it, players are tasked with seeking out several tour guides hidden throughout New Britannia. Once all have been found and spoken to, a unique hat or mask is given to the player.
The item obtained is linked to the players account and will be made available to them when the game is released. Because you can only unlock it during a given pre-alpha release, the item is considered rare and may be a valuable trade item (or keepsake) when the game formally releases.
The Grand Tour is designed to lead players to new content that has been created during that particular release.
Below are a list of rewards and their corresponding release.