DOS Games Discussion

As a child I always had this friend of mine come over. In around 2016, we played this awesome rpg-dungeon like game from a 2d perspective but with 3d graphics. It was really cool and detailed, you could switch armor and stuff. We played the game on y8 though, so it was a demo... You could (and probably still can) buy the game on steam, and I have a really old memory of seeing, like, the first thing after you enter the bought game, you wake up in some kind of ventilation system, and there's this really loud clanking noise whenever you take a step. Please help me find this game, it means a lot to me.
I remember vividly that the name could include a word like fighting, or bros. At the end of the demo there was a boss as well. The style of the graphics was kind of like runescape but a little bit more detailed, not like dead cells in any case.