VENUS is a Monte Carlo event generator for hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions. VENUS is based on gribov-regge theory and classical relativistic string dynamics. This model also has some very important features. Venus allows secondary interactions to occur, which is very important for hadron-nucleus and nucleus-nucleus scattering. It also incorporates the participation of antiquarks in the colour exchange mechanisms to form strings. VENUS is written in FORTRAN 77 consisting of subroutines and common blocks. Here
you can read more about this event generator.
Below you can see an examplary option file for VENUS. The source of this file you may find here