Here is the full list of all 28 Tea Party Simulator 2015 achievements.
Activate the monolith.
Use the dynamite.
Completed the third level.
Witness the potato box flying through space-time.
Completed the second level.
Activate the sunglasses.
Activate the snake.
Activate the turnip.
Activate the fish!
Activate the top hat.
Activate the aviators.
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!
Witness the zeppelin.
Witness the Red Baron.
Completed the first level.
Flip the bird, if the bird were a fancy bird.
Completed the fourth level.
Completed the final level.
Activate the calm book.
Use a frag grenade to end your tea party.
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!
Let the chi flow through the spasticity of your hand.
This hand ain't goin' nowhere.