  Mountain pass in a suitable Orlicz space is employed to prove the existence
of soliton solutions for a quasilinear Schr\"{o}dinger equation involving
critical exponent in ${\BR}^N$. These equations contain strongly singular
nonlinearities which include derivatives of the second order. Such equations
have been studied as models of several physical phenomena. The nonlinearity
here corresponds to the superfluid film equation in plasma physics.
