So, so, so many… Right now in the AP website, you can see a list of 79 supported games. If you look in the AP discord they also have a spreadsheet that have games with connectors/randomizers being worked on, a lot of them which are stable and playable, and that list has 454 more games.
If you want a different experience for this game that gives you more replayability, I suggest checking out archipelago: https://archipelago.gg/
Archipelago is a multi world randomizer that connects games and shuffles everything between them, for example someone can be playing zelda ocarina of time, open a chest, and find in it Mario’s ability to jump in someone elses game of super mario world.
Stardew valley is randomizable in AP as well, which can give you different goals, like completing a randomized community center, marrying and having kids, perfect evaluation, among others you can choose. You can connect it with other games your friends are playing, but if they also want to play stardew, you are able to send each other gifts to help each others progression. Everyone can have different goals, you all choose what you want to randomize, like randomizing entrances, having to unlock seasons, randomizing recipes, and more.
I very much recommend it, AP is a lot of fun, and I bring stardew to it often, depending on the settings you make you can have it be a single gaming session thing or a multi day affair, and always more fun when you have friends also playing stardew and you help each other finish the goals.
I really like it, been playing it a lot, but it’s definitely different than vampire survivors so I wouldn’t recommend it based on that. The demo gives a good idea of the experience though, I’d suggest to try it out.