Here is the full list of all 28 Tea Party Simulator 2015 achievements.
Activate the sunglasses.
Completed the first level.
Completed the second level.
Completed the third level.
Completed the fourth level.
Completed the final level.
Activate the fish!
Activate the top hat.
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.
Flip the bird, if the bird were a fancy bird.
Why would you shoot ted?! He's your best and only friend!
You really aught to do something about that stabbing habit.
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.