Here is the full list of all 27 Tabletop Simulator achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Save 100 items to your Chest.
Upload at least 3 legitimate Steam Workshop items.
You tried to flip the table… and failed!
Play Tabletop Simulator for over 1000 hours.
Play Tabletop Simulator for over 500 hours.
Play Tabletop Simulator for over 200 hours.
Create an 8 player “light show” with the line drawing tool.
Flip the table over 1000 times.
Flip the table in an absolute fit of rage… 100 times.
Play Tabletop Simulator for over 100 hours.
Play Tabletop Simulator for over 50 hours.
Play a civilized game of Chess for 1 hour.
Tint 1000 objects a different color.
Spawn 10,000 poker chips!
Play a game in zero gravity.
Complete the tutorial in under 30 seconds.
Play a game with a full room of 8 players.
Lock 5000 items over time.
Use your personal color page in the notebook.
Change your color more than 50 times.
Play the game for 1 hour without flipping the table.
Have two RPG figurines attack one another. They must hit!
You posted a message in global chat, hurray!
Play Tabletop Simulator for over 10 hours.
You spawned the developers’ special figurines!
Play a game with someone on your friend's list
Complete the in-game tutorial.