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