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