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