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