>>96065398As the other anon said it's Adventure Quest.
Adventure Quest was a flash game in the mid 2000s that was fairly popular famous for its one time payment model with a premium currency that could be bought with real money or earned in game.
It competed with Runescape in the earliest days thanks to cheaper buy-in than a paid monthly membership.
It was hosted on a website called Battleon and they would eventually go on to make other games in a sort of shared universe with overlapping characters and ideas. Dragon Fable was mentioned already but there was also Adventure Quest Worlds the mmo, Mech Quest the short lived sci-fi version, and I think another one whose name is escaping me.
There was even an Adventure Quest 3D released just a few years ago.
The company that made it is still around, not sure how they keep the lights on but they still exist.
As for Adventure Quest, it was very primitive and had a lot of early 2000s weeb energy and lol random humor.
Whether this is a positive or a negative is pretty divisive.
That's the longest short version I can give I guess. It's very much a "you had to be there" kind of thing.