  We study the localized tachyon condensation in their mirror Landau-Ginzburg
picture. We completely determine the decay mode of an unstable orbifold
$C^r/Z_n$, $r=1,2,3$ under the condensation of a tachyon with definite R-charge
and mass by extending the Vafa's work hep-th/0111105. Here, we give a simple
method that works uniformly for all $C^r/Z_n$. For $C^2/Z_n$, where method of
toric geometry works, we give a proof of equivalence of our method with toric
one. For $C^r/Z_n$ cases, the orbifolds decay into sum of $r$ far separated
orbifolds.
