Gray

"We were the next generation of a project launched in Roswell. We were to be unstoppable ground troops, unfazed by cold or radiation. In other cases, our DNA was to be harvested to create biomodifications for humans, so that they could survive the aftermath of a nuclear war.

To prevent us from overpowering our masters by sheer numbers, we were created unable to reproduce. That is why the Templar threat to us is so dire — we are all that remains."

- Gray

Grays are genetically-engineered creatures in Deus Ex and Deus Ex: Invisible War.

Physical characteristics
Grays are the products of experiments undertaken by the Majestic 12-operated company, VersaLife. The Grays are created by crossing DNA retrieved from other creatures with human DNA and other genomes, hence Grays, along with Greasels and Karkians, are known as transgenics.

Grays are gray/silvery in complexion, are totally hairless, have enlarged heads and solid black eyes, and have long, gangling arms and legs. Their appearance resembles that of a generalized portrayal of an alien. In fact, those working with MJ12 non-directly (such as one of the mechanics in Area 51) have been told that they actually are aliens, likely retrieved from the Roswell Crash, although this is not true and is simply a cover story for the media by the time of 2072.

Grays thrive in frigid or radioactive environments (but are capable of living in warm and non-radioactive environments as well), hence the reason why they are normally found in radioactive areas in Area 51, and why they live in Antarctica in Deus Ex: Invisible War.

Grays can swipe at enemies as a melee attack. Their ranged attacks include psionic blasts (in Deus Ex), or radiation (in Deus Ex: Invisible War).

Role in the storyline
Grays in Deus Ex do not talk, because in the only two areas where they are found (VersaLife and Area 51), they are kept isolated in cages and have thus become feral and hostile. During the Collapse event, JC Denton frees the Grays from Area 51, and convinces them to help him. It is unclear how the Grays became more civilized (JC's merger with Helios may be a factor), but in Invisible War, not only do the Grays talk, but are very friendly to any ally of ApostleCorp. The Grays are also revealed to live in Antarctica in Invisible War. Due to their lack of biomod infusions, Grays cannot go through the portal, and so must be transported the long way to the ApostleCorp facility in Trier.

Grays will readily attack any enemy of ApostleCorp, including the player (Alex Denton), if he/she is affiliated with another faction in the endgame. Because Grays are genetically-engineered, the Knights Templar attempt to kill them whenever possible. In the Templar ending, a Gray can be seen hanging from a noose.

Gallery
Szarak