(There's a gun on the shrine. A blessed gun for a good hunt?)

(It's broken now, but was a powerful weapon a long time ago.)

{Radgam:}
Don't touch that!

{Edge:}
I... I'm sorry.
It's such a rare gun, so...

{Radgam:}
Oh, you can tell, eh?
This is no decoration!
It's a shrine for my fallen comrades.
We fought in countless battles...
They were all killed by the monsters,
leaving me, and one other...

Could this imply that Radgam and his comrades were once on an adventure with the dragon, fighting countless battles with ancient age monsters, just like edge, Gash and Azel?

{Radgam:}
The Guardian Fire protects Zoah.
Its power keeps the monsters at bay.
The people are safe as long as they
stay in the city.
Hey, rookie, do you believe that the
hunters serve a greater purpose?

{Edge:}
Yeah, I can feel it.
Everyone has their own destiny.
That's why I travel, and that's
why I fight.

Did Radgam have a greater purpose, a journey with the dragon? Did he once stop an ancient creation from destroying the world in an unknown adventure?

{Radgam:}
It's not a good idea to get
involved with seekers, boy.

Was Radgam once a Seeker? Could Seekers including Gashe’s mentor Lundi, have aided him in his journey with their vast knowledge of the Ancient Age, resulting in a tragedy?

{Radgam:}
You should see the world
while you're young.
You have great potential.
Don't let it go to waste.

Good advice to someone who potentially had a great adventure with the dragon. He most certainly would have seen many things in his adventures and would have experienced many battles. It is very possible that his adventure could have taken place just after Panzer Dragoon (Imperial year 90 A.F.- 99 A. F.) and ended just before PDS started. An adventure in a different location than the places in the Panzer Dragoon universe we have already seen. We will never truly know if Radgam was a dragon rider, but his possession of an ancient age gun just has to make you wonder…. Was he the true 4th dragon rider?