--- a/pytouhou/game/effect.pyx
+++ b/pytouhou/game/effect.pyx
@@ -15,8 +15,6 @@
 from pytouhou.game.sprite cimport Sprite
 from pytouhou.vm import ANMRunner
 
-from pytouhou.game.game cimport Game
-
 
 cdef class Effect(Element):
     def __init__(self, pos, index, anm):
@@ -33,32 +31,3 @@ cdef class Effect(Element):
             if self.sprite.removed:
                 self.sprite = None
                 self.removed = True
-
-
-
-cdef class Particle(Effect):
-    def __init__(self, pos, index, anm, long amp, Game game, bint reverse=False, long duration=24):
-        Effect.__init__(self, pos, index, anm)
-
-        self.frame = 0
-        self.duration = duration
-
-        random_pos = (self.x + amp * game.prng.rand_double() - amp / 2,
-                      self.y + amp * game.prng.rand_double() - amp / 2)
-
-        if not reverse:
-            self.pos_interpolator = Interpolator((self.x, self.y), 0,
-                                                 random_pos, duration, formula=(lambda x: 2. * x - x ** 2))
-        else:
-            self.pos_interpolator = Interpolator(random_pos, 0,
-                                                 (self.x, self.y), duration, formula=(lambda x: 2. * x - x ** 2))
-            self.x, self.y = random_pos
-
-
-    cpdef update(self):
-        Effect.update(self)
-
-        self.pos_interpolator.update(self.frame)
-        self.x, self.y = self.pos_interpolator.values
-
-        self.frame += 1