This mod attempts to make the Gladiator work outside his home in any arena. Stage 1 works very well, Stage 2 has some limitations but he functions fine enough.

The Gladiator Unleashed is fully compatible with the vanilla boss fight.

Here's all the differences with the regular Gladiator:

Stage 1
-Still can't walk normally;
-Has more HP;
-An unused dodge roll attack has been restored, it replaces the close-range shield bash and follows up into the last attack of his Gold combo;
-His short-winded flail attack, if not countered, now follows up into a short-winded Ethereal Shield attack, into his jump attack;
-His long-winded flail attack, if not countered, now follows up into itself, into a long-winded Ethereal Shield attack, into his jump attack;
-His raw jump attack, if not countered, now follows up into his dodge roll attack, into the last attack of his Gold combo;
-When he spawns demons, after a short while, he launches his Ethereal Shield attack, into his jump attack;
-His Ethereal Shield attack has the properties of the Gold Gladiator, and buffs demons when hitting them;
-Can phase through walls when jumping;
-When the Shield is destroyed, the Slayer breaks out of the animation quicker (only available in the Ultimate Custom AI Collection);
-Doesn't drop HP on Glory Hit (unintentional)

Stage 2
-Has less HP;
-Can walk towards the player, but only if the player isn't in an unreachable position, otherwise he will attempt to reposition and stand still with his shield up;
-His flail shield attack has the properties of the Gold Gladiator;
-When up-close, instead of an instant attack, you now have time to counter him. If not countered, will follow up into his jump attack;
-When he spawns demons, after a short while, starts his Jacob's ladder attack (very buggy);
-Doesn't drop HP on Glory Hit (unintentional)


The Gold version is mostly identical, with three main differences:
-Every attack leaves behind a trail of fire;
-When he spawns demons, his Ethereal Shield attack will follow up into itself rather than the jump;
-His Ethereal Shield attack gives demons an Eternal Buff when hitting them, rendering them immortal until the Gladiator dies (only available in the Ultimate Custom AI Collection)


Ultimate Custom AI Collection
Eternal Buff


The zip contains an example encounter, to access it start from a new save file in the main campaign, you will be fully loaded, then play Hell on Earth until the gate before the Heavy Cannon opens, then reload checkpoint and the encounter will start. Just play it on ITYTD, it's not balanced at all and is more of a stress test than anything since that's probably the worst type of arena you can put the Gladiator in, but if I can somehow make him work perfectly there, he'll work perfectly anywhere in the game.