ID this arcade game

You were a gladiator, and you kept moving to the side, gradually losing pieces of armor. The joystick lets you move your shield up and down. It was pretty detailed, from what I recall.

Is this it?

YES. Thank you! It was so weird but I can’t put my finger on why. Is it really just called Gladiator?

No idea - I just searched for ‘gladiator side-scroller arcade game’

Sigh That probably should have been my first move. Thank you again.

Yep.

I remember the demo of that game.

“Agathon!”

“Irene!” (Pronounced “E-ren.” Also the only boss the demo doesn’t insult.)

And of course there’s a TV tropes page.

Looking at the video, I think it was just weird on its face…

I played this a ton in my first year of university in England. It was call The Great Gurianos (at least in th arcades I played in).

https://www.gamesdatabase.org/game/arcade/great_gurianos