Thank you so much for playing, and asking!!! 😻💖💝 We can def add one to the announcement post when the full game releases! 🫡 I think most of them will be pretty obvious except for the Cameo one, which requires a couple specific actions.
Some of them will be tied to seeing the romance endings, but if you want to 100% achievement the game without actually reading all the routes, renpy has a "Skip: Unseen Text" option 😆 which is perfect for testing purposes, but also for getting achievements, once you feel like you've had your fill of the game 🤣💖
I highly recommend trying to get the achievements though (in the final game), the little pixel art icons PixeledBean made for them are SO CUTE!!! 🥳😻