There are lots of great games that are available for free (or at least just the cost of printer paper and ink). Some are homebrew, some are games that are available to print as a demo, and some are just weird. And I cannot stress just how much Jondi hates Werewolf.
Everyone wants to go to space, but very few people think about the implications that zero gravity would have on playing board games. Board games are not a popular hobby in any space related medium that I am familiar with, so why so many space games?