PlotagonRocks' 1.9 Map Trilogy is a series of which has three levels per volume, hence it's name. It has two volumes so far.
The first volume consists of Close to Double, P.U.L.S.E, and Moose.
Close to Double is the first level in the first volume. It consists of a somewhat hard difficulty. It has easy-to-understand gameplay with spacious ship and UFO parts. It and P.U.L.S.E were supposed to be brother levels.
P.U.L.S.E is the second level in the first volume. It is somewhat harder than it's would have been brother level, Close to Double. It also has easy-to-understand gameplay, although having mini UFO parts that require memorization.
Moose is the final level of the first volume. It is notably harder than P.U.L.S.E, especially the first ship part. It is the only level in the entire series not to start with a cube part.
The second volume consists of Vibrant Blast, Bloody Circles, and Pew.
Vibrant Blast is the first level of the second volume.
Bloody Circles is the second level of the second volume. It is a hell-themed Nine Circles level. It is one of the most decoratively different Nine Circles levels.
Pew is the final level of the second volume. It appears to be a generic 1.9 level with SUPER simple decoration.