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