* A haunting
cyberpunk / dark sci - fi
setting * Fast - paced, old - school shooter gameplay * Hordes of enemies to destroy * Epic boss fights * A deep, experience - based weapon upgrade system * High - fidelity graphics with full dynamic lighting * Extensive
use of physics and dynamic environments * Exclusive in the extended edition: four new creature types, a new boss monster, five new campaign levels with a total of about three additional hours playing time as well as two new levels for the survival mode and an improved graphics engine.