Our website has a list of all the games we’ve released. If you don’t see the game you’re looking for in that list, then it’s probably included in one of our Party Packs.
For example, Trivia Murder Party is one of five games in The Jackbox Party Pack 3 and there is no way to buy it individually.
Most of the games we make are available on all of the platforms we support, but not all of them. Each game's page on our website lists which platforms are supported for that game.