Cyberrun: Prelude to the Apocalypse

From publisher blurb:

Cyberrun is a short mini-setting/rules expansion which can be used to adapt the free Apocalypse Essentials post-apocalyptic RPG rules to run games in the dark near-future... either with or without an actual post-apocalyptic component.

Contains additional class, skill, and cybernetics rules originally from the main Transdimensional Adventures rules set, as well as new hacking rules, revised equipment and additional character creation notes and guidelines for cyberrunner characters. Transdimensional uses a simple d20 + modifiers game mechanic with versatile character generation and medium rules complexity.