Combat knife

Combat knife is a weapon in Deus ex, and Deus Ex: Invisible War.

In-game Description
Deus Ex Description "A ultra-high carbon steel knife."

Deus Ex: Invisible War Description "A heavy military knife. Ultra high carbon steel. Virtually unbreakable. Heft and balance make it suitable for slashing and stabbing."

Unique weapons
In Deus Ex 2, There is a unique variant of a standard combat knife: the Toxin Blade.

"Prototype special forces combat knife. Microporous metal releases toxins on contact. Designed for political assassination"