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