X1

X1 is a krogan antagonist in Mass Effect: Infiltrator.

Mass Effect: Infiltrator
X1 is a krogan that has been heavily experimented on by Cerberus on their space station: the Barn. It has been modified genetically and enhanced with technology in the form of energy weapon gauntlets and integrated generators.

It is several times the size of a normal krogan and seems incapable of speech. It is unknown whether or not it is controlled by Cerberus or has simply gone insane after the experimentation it is been put through.