No missable achievements (plus 12 unknown)
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Didn't let a single enemy reach the fort throughout a level.
Unlocked a tile for anchors on any level.
Installed all types of weapons accessible on a level.
Place all towers available in the episode
Completed a level with the time machine's health below 10 points.
Used bonuses 10 times on a single level.
Used all the different types of bonuses on a level.
Collected 10,000 coins in a single level.
Completed a level without improving weaponry.
Sold 10 weapons on a single level.
Destroyed 20,000 enemies throughout the entire game.
Placed all types of weaponry accessible in the episode on a single tile.