So many detailed costumes and talented cosplayers are on the Internet that it can take a while to discover some of them. Case in point is this Mass Effect FemShep costume by Freya Willia. She started construction on the armor in 2012 and documented the process in detail at The Replica Prop Forums (RPF). The armor is mostly vacuum formed styrene and carbon fiber vinyl. Freya cast her hands and chest before starting the build to help her figure out the right proportion for the various pieces of armor (she wanted to make it leaner than what’s seen in the game) and to use as a base. The suit underneath the armor was a custom graphic designed by Freya and printed by DPI onto nylon spandex. Though the gun was made by Volpin Props, Frey constructed the omni-blade with a paper pattern that she then transferred to acrylic and laser cut and glued back together.
Read more about the FemShep build at The RPF.