xamotomax

"Something like that," Gordon says. "The humans they've taken for 'upgrading' into their Overwatch soldiers... no one's ever seen an Overwatch with a daemon. Or an Overwatch who does anything except what the Combine tell him. Most of their armies are synths- bionically upgraded and controlled organisms from half a dozen universes. The Overwatch is their way of testing whether we'd make good synths ourselves."