Follow the Path is a set of maps that feature preset paths, changing the game's usual formula of having the player create the path themselves using towers. These paths cannot have towers built on them, and all aliens, including flying ones, will follow them, leaving the grass all around open for the player. There are four maps in this set in the iPhone versions, and five in the iPad version.
Main Article: Maze
Maze is a medium-level map that is 16x18 units in playable space. It features path that winds around the field, separating three sections of grass total and a maximum of 40 towers. Starting funds are 100 coins.
Main Article: Enigma
Enigma is a medium-level map that is 16x19 units in playable space divided into nine sections of grass able to hold a maximum of 120 towers. It features a path that winds through the majority of the field. Starting funds are 100 coins.
Main Article: Micro
Micro is a hard-level map that consists of a spiral that goes outward from the landing site to the farm in the bottom left corner. It is just 10x10 units total, with space for a maximum of 44 towers, with no walls or separated areas for the landing site and the farm, hence the name. Starting funds is 150 coins. It is exclusive to the iPad.
Main Article: Labyrinth
Labyrinth is a hard-level map very similar to Maze. It is 18x18 units in playable area, a maximum of 30 towers, and starts with 115 coins.
Main Article: Spyra
Spyra is a hard-level map that is the same thing as Micro, but larger and inverted. It is 30x30 in playable area, a maximum of 74 towers, and starting funds of 100 coins.
Main Article: Infinity
Infinity is a hard-level map that consists of a shape like a large tuning fork. The aliens go up to the top, then around almost to the bottom, and then back again to the farm at the center. There are playable dots on either edge. The map is perfectly symmetrical. It is 20x12 units in playable area, a maximum of 106 towers, and starting funds of 88 coins.