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