The dungeon crawl side of Ultima!
The regular Ultima games were all about top down RPG play, almost without exception, but this game series here, Ultima Underworld changed all that up, to create a first person Golden Box style type of deal for the series, to capture the attention of those that wanted to play Ultima, but, ultimately (sic!) were put off by its top down build. Nope, Ultima Underworld is a genuine dungeon crawl, underground bound and very close in style to what a dungeon crawler should be like. It features a really alright 3D engine (or pseudo 3D, alright, depending on how you look at it) which is capable of displaying really intricate worlds, and, thus, can really manage to offer you a lot of fulfillment. Sure, the story is much less top and center this time, but that is alright, most of the time you will be scouring to find your way and to avoid traps, which is what the genre should be all about! So, yeah, play it, see how you like it, and maybe you'll put Ultima on the map for yourself as well, if you're not much of a top down player. Oh, and try the second game as well. (hint: GOG packs them both bundled together, for ease of use!).