Here is the full list of all 20 Touhou Gensokyo Visitor achievements.
Move to Gensokyo
Successfully evade 3 attacks
Didn't try any frozen berries.
Don't show any compassion
Experience the effect of stopping time
Miss the chance to eat. Again.
Block an attack with improvised stuff.
Meet the mountainshakers.
Break the laws of physics.
Don't eat because too busy surviving.
Successfully land.
Realize everything.
Try to die, but not succeed.
Be in the same location with food.
To eat whatever you want behind the scenes.
Realize that you are a pawn of a plan within a plan within a plan within a plan...
Really ;)
Return home.
Watch the credits.
Watch the scene after credits.