For me, it was the user uploaded models in Action Quake 2. There were a couple that came to mind: a tiny gray alien with hitboxes to match as well as a model o

For me, it was the user uploaded models in Action Quake 2. There were a couple that came to mind: a tiny gray alien with hitboxes to match as well as a model of Trinity (from the Matrix) that was all black and slimmer than the typical male characters.