Is there just one theme?
Yes, all locations all over the world share the same theme for the jam.
I want to know the theme!
For the usual in person GGJ the theme is announced at each local jam site after 17:00 local time on Friday. Time zones from New Zealand to Hawaii are all participating.
For GGJ 2023 we will be announcing the theme globally at the same time on 28 January between 9am-10am Pacific.
Given the nature of GGJ allowing for multiple formats there will be no need to keep the theme secret and we ancourage everyone to share it far and wide with your social networks.
For themes from past years, see the Global Game Jam® History.