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