Sheppard O'Neill

General Sheppard O'Neill is a character in Deus Ex: Human Revolution.

Background
He was present at the Sarif Industries labs at the night of attack by the Tyrants, checking the progress on Typhoon Explosive System. Vasili Sevchenko, one of the scientists working on the project, provided him with a demonstration of a very early version of the augmentation, with which O'Neill was impressed.

Behind the scenes

 * O'Neill might be Canadian, as his uniform has the Canadian "Land Forces Command Badge" (white badge with 2 swords going through a Maple Leaf) and Crowns on his shoulders.
 * Later in the game, if the player hacks David Sarif's computer in his office, they can read an e-mail in which he and O'Neill discuss the concept of a "skull-gun", which in Sarif's opinion would never be viable as a mechanical augmentation. It's a reference of the nano augmentation "Skull gun" wanted by Gunther Hermann in Deus Ex (even if he is a mech-aug) and was to appeared in Deus Ex: Invisible War usable by the nano-aug protagonist Alex Denton before it was cut for the final version of the game and only a datacube in the ruins of UNATCO HQ talk about it.