The story of Mass Effect is that the player is part of a special force in which they help stop the machines. The story focuses on the protagonist, Commander Shepard and his quest to stop the rogue Spectre Saren Arterius who is trying to over-rule the galaxy with an army of machines known as the Geth. In Mass Effect, you will very much enjoy the action in the galaxies of space. Learn how to download and install Mass Effect for free in this article and be sure to share this site with your friends. Download Mass Effect for FREE on PC – Released on November 20, 2007, Mass effect is an action role playing third person game developed under the banner of BioWare.