Evola

This game takes place in an operating system whose sole function is to simulate a virtual world full of creatures whose behaviors evolve over time. Each creature runs as a separate process. Operating system constructs like signals, files and network ports are represented by objects in this world, and their usage is exposed to running programs by their presence.

STORY: EvulOS was invented by a grad student for his thesis, and later gained government research funding. But its inventor is not the only one working on it. A secret organization has copied his operating system, launching a plot to destroy the digital infrastructure of modern society. A committee organized to coordinate the handling of this crisis has hired an expert videogamer (the player) to prevent that evil plan from coming to fruition.