Includes Mercenary expansionThe gut-wrenching Descent saga continues with more pulse-pounding action than ever before. Dive into massive subterranean strongholds and experience a whole new degree of freedom, as you careen through canyons and craters on the surface above... powered by the all-new Fusion™ engine. Test your piloting skills against an army of battle-drones and assault-bots using an extensive arsenal of tactics and heavy firepower. Immerse yourself in the wonders of the Descent universe, filled with new friends and old enemies, as the plot twists and turns with each daring mission. Prepare yourself for an explosive new 3D action experience with that will turn you world INSIDE... OUT!- Master the unique armament and performance handling of three new fighters.- Devious AI impels robots to hide, advance, retreat, summon back-up, and work in teams- Specular and reflective surfaces allow for incredible effects. Now you can lurk in the shadows and sneak up on your enemies.