The source code can be compiled on DOS or Unix systems. The Tierra Simulator has a new user interface which allows you to graphically view the distributions of size and genotype classes during a run. The output is an opcode.map file. This is used on a regular basis to generate graphics of size of creatures over time during a run. It is used after a run, and is highly recommended as a tool for analyzing the results of a run.
Many new genomes are now available.