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