The duration of this game jam is 2 months. The theme is set to be about vikings. That means that you only have to include anything viking related to your submission, but creating a whole viking world would be a cool thing. Take your inspiration from Mythology, history, architecture or whatever you like.
The final game should be at least playable on Windows10 or the web. If you add more plattforms it is obviously even better, but isn't needed.
You can use any engine and tool of your choice.