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