From the older Duke Nukem video games.
A short profile (plus guns) of Duke Nukem back in Duke Nukem 3D, which was a long time ago (especially on the video games time scale).
I suppose he’s a classic character, in a way. Just not a good way.
Alien grunts from the offworld army that invades L.A. in the vintage Duke Nukem 3D video game. They’re good generic alien soldiers.
The psychic floating alien evil squids from the vintage, 1990s Duke Nukem video games.