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