All of the enemies have been implemented, but use placeholder graphics at the moment (except for the Sphereoid, which I forgot to show, but will upload a video) as I currently don't have the 3D models from the original game. And their AI is in very preliminary stages.
One thing that's interesting to note about the original's enemies is that in addition to health, they also seem to have an armor pool like how the Doomguy does.
For instance the huge security droid, starts with 3000 health & 3000 armor. The armor soaks up a majority of all damage until it is fully depleted, then it's basically like a standard 2.5D game monster that had no armor to begin with.
The original even came with the AI editor that comes with the debug menu inside the pause menu while in-game, and it lets you change how frequently the enemies will start attacking, how much they'll advance towards you, how long they'll wait before moving again, and so on.
