Be Careful with This Colosseum Bug
It worked fine for me. Maybe try pushing another Main Quest or two and try again to see if its a specific quest state that prohibits you getting the hammer?

7 fixes · 8 how-to answers · Steam discussions
It worked fine for me. Maybe try pushing another Main Quest or two and try again to see if its a specific quest state that prohibits you getting the hammer?
No confirmed fix yet. Players suggest: Update your GPU drivers and then verify game files.
No confirmed fix yet. Players suggest: yeah had the same, reloading fixed it.
No confirmed fix yet. Players suggest: Still have my current save on PC, but steamdeck doesn't update.
Suggested fix (unconfirmed): Cambia el idioma del juego a inglés para evitar el texto en francés. Espera a que los desarrolladores lancen un parche con la corrección.
Suggested fix (unconfirmed): Update your graphics drivers and Windows. If that fails, try deleting the game's shader cache.
Suggested fix (unconfirmed): Completely close the game before putting your device into sleep mode. Alternatively, ignore the discrepancy since it does not affect gameplay.
No confirmed fix yet. Players suggest: I had to set all mine to 1080p, cuz 720p is too blurry and native 4K, while I can run it, makes my GPU sound like a jet engine and I'm trying to not to burn it out & have to buy a new one for $1 million dollars I dunno…
No confirmed fix yet. Players suggest: keep in mind that if the game updates, all the mods may break.
Suggested fix (unconfirmed): Double-check your kills against an expanded guide that includes Jotunn, as common lists often miss it. If you have definitely killed all 15, try verifying your game files or defeating them again while online to trigger the achievement.
Suggested fix (unconfirmed): Grind levels and vision ranks by farming Cactuar enemies and Fairy Pots near cactus plants on every island. Prioritize vision skills that grant multiple actions and swap visions frequently to earn AP+8 level 4 bonuses.
Some mobs that has rare drops/steal or rare monster in general.
A list of every Vision available in the game and where to find them.
I guarantee there won't be any rope-jumping or lightning-dodging in this one! But be warned, there are spoilers ahead. *If you like this guide, please consider giving an award.*
What This Guide Will Cover: Complete Walkthrough – Step-by-step story progression. All items as well as all Achievements