Threres this old game i used to play that came with my computer?

I dont remember very much, but it had a dungeon, and you pick a character, and it can either have a dog or a cat as a pet... theres potions that you can drink, to make your stamina higher, and stuff like that... when you get in the dungeons, there are animals that try to kill you, like rats and stuff, and i THINK that every time you got to a certain level floor on the dungeon (the goal was to get to the bottom) then so the lower you got the harder the master of the floor was to beat? i think, but i dont really remember... but, yaaa sooo anyy help would be greatly appreciated(: hahaha sorryy this information isnt very good, but i hope you can figure out what im talking about!!!<3