Here is the full list of all 24 Coffee Talk achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Trash a total of 25 drinks
Unlock all achievements
Spent a total of 1 hour making Latte Art
Unlock all special drinks
Serve 50 correct drinks in a single session of challenge mode
Serve 25 correct drinks in a single session of challenge mode
Serve 10 correct drinks in a single session of challenge mode
Find the secret behind the barista
Play the story mode to conclusion once
Help Neil to help you
Finish Gala and Hyde's arc
Unlock all the artworks in the Gallery
Finish Rachel and Hendry's arc
Unlock all of the characters social media profile
Listen to all of the songs
Serve Gala Had when Gala turns into a werewolf
Finish Lua and Baileys' arc
Meet all of the main characters
Reach a certain point in the story
Serve the wrong drink for the first time
Trash your drink for the first time
Create and serve your first latte art
Brew your first drink
Start a new game