Here is the full list of all 35 Touhou Monster TD ~ 幻想乡妖怪塔防 achievements.
Defeat 20 enemies by one attack.
Win the first level in normal mode.
Defeat 1000 Kedama.
Defeat Unknown Doggy.
Defeat Unknown Ball.
Defeat Unknown Tentacle.
Defeat Unknown Boss.
Complete main story levels with three stars.
Complete main story levels in Eazy mode.
Complete main story levels in Normal mode.
Complete main story levels in Hard mode.
Complete main story levels in Lunatic mode.
Complete main story levels in Hero mode.
Complete main story levels in Challenger mode.
Unlock all Gensokyo-Wiki items.
Build 8 different Level 5 unit in a game.
Let Minoriko generate 5 points.
Still have 1000 points left when finish a level.
Unlokc all upgrades.
Start every wave earlier in a level.
Build only one type of unit in a level.
There are 12 train cabins exist in the game.
Defeat 1000 enemies by player characters.
Use Bomb to defeat 200 enemies.
Play 100 games.
Use Cirno to freeze Suwako 100 times.
Lose in Easy Mode.
Win a level with 1 HP left in Story Mode.
Use Yuka to grow 32 Sunflowers in a game.