Here is the full list of all 28 Tea Party Simulator 2015 achievements.
Activate the monolith.
Activate the aviators.
Activate the top hat.
Completed the final level.
Completed the fourth level.
Why would you shoot ted?! He's your best and only friend!
Use the dynamite.
Completed the third level.
Witness the potato box flying through space-time.
Completed the second level.
You really aught to do something about that stabbing habit.
Activate the snake.
Witness the zeppelin.
Witness the Red Baron.
Completed the first level.
Flip the bird, if the bird were a fancy bird.
Yes, well ... I'd call you a buffoon too if you poured hot water on me. Indeed!
Activate the fish!
Activate the turnip.
Activate the calm book.
Use a frag grenade to end your tea party.
Activate the sunglasses.
Make a tea within a tea, or something.
Get an 'S' rank in every level, in both Mode 1 and Mode 2.
Get an 'A' rank in all Mode 2 levels.
Get an 'A' rank in all Mode 1 levels.
Let the chi flow through the spasticity of your hand.
This hand ain't goin' nowhere.