Extra challenge comes from each level having two bonus objectives aside from the primary one of eliminating the target or making it to the end of the level, most of them mutually exclusive. (wolfsgamingblog.com)
Directors maintain the battlefield with a variety of controlling abilities and allow their forces and teammates to eliminate targets with ease. (valiance.shogn.net)
Although neither technique eliminated the targeted DNA from eggs or embryos, that probably isn't necessary, he says. (sciencemag.org)