* Art of Fighting series (1992 to 1996)

One of the first fighting games to include battle damage showing on the characters as the fight progressed. One of the first fighting games with a thought out and fleshed out story line with continuity going into other series like Fatal Fury, Real Bout and Last Blade. One of the first fighting game series showing characters age and progress as the story line moved forward. Zoom cameras depending on distance from opponent.

Quest for Glory

Ultima

Wizardry

Might & Magic (non Heroes)

(One anecdote about the obscurity of Ultima: GameFAQs does (or at least used to do) a best game ever poll tournament periodically. There was (at least) one year where there was a division called the "Ultima division", yet it didn't have any Ultima games; it appeared to have been named after a spell from the Final Fantasy series (first appeared in FF2, but it's really FF6/FF7 where the spell became famous).)

Galciv

Why do you think Ultima is obscure

Because it's not mentioned much in the modern era, hasn't had a new release in decades, and that GameFAQs instance I mentioned.

In particular, Ultima rarely comes up in game discussions these days.

Ah Dragon Warrior! I miss that Westernized localization of the early Dragon Quests. When I was playing them as a kid they felt like sort of a DND or Lord of the Rings style fantasy campaign. I had no idea what Dragon Ball was and I kind of wince when I see the original art these days.

Compare these two covers:
Dragon Quest II (Japan)
Dragon Warrior II (USA)

Same game, totally different mood.

Would kill for a Dragon Warrior 5, but I don't know how that's even possible. I suspect Dragon Quest V's SNES art is too anime and the whole game would have to rewritten from scratch to do it justice.

Maybe it was obscure in the US, I don't know, but not so much in France (and possibly in other European countries). The series was well known despite the fact that DQ was never released outside of Japan. I remember talking about DQ games with so many people back in the days, and we all eagerly hoped for a localized version of the game. Some magazines even had (sometimes brief) articles about the series. I personally was lucky enough to have played the Japanese versions of DQ1-2-3 (the Roto trilogy), thanks to a classmate who knew Japanese from his Japanese mother.

The fact that so many kids were watching Dragon Ball every week and thus being already familiarized with Toriyama's work probably helped a lot.

Even more obscure are many of the console Ultima games, of which I think only Ultima 3/4 are really well known. What we have here is the following:
* Ultima 3 NES (there's also a cartridge version for the MSX; the disk MSX version is a port of other computer versions): A semi-faithful port, with some differences, even if the basic mechanics are the same. Decent in its own right (if you don't mind enemy level scaling), but I prefer computer versions.
* Ultima 4 NES: Quite different from the PC version, but still quite good. This is the game that got me into the series, actually. There are some nice quality-of-life things, like being able to simultaneously equip a melee weapon and a bow, being able to target any enemy on the battlefield, and with the new battle mechanics, attacks don't miss that often. It is somewhat simplified, but still manages to be good in its own right.
* Ultima 4 SMS: Actually pretty faithful to the PC version, with some differences like being able to attack at any angle, and for whatever reason they got rid of the first person view in dungeons. (The SMS is clearly capable of it, as is evidenced by Phantasy Star.) Even the music is preseved.
* Ultima 5 NES: Bad. Kusoge. If ranking games by how good they are, this game would share its tier with the likes of ET, Action 52, and Big Rigs; if you disagree with this, it's probably because you don't think ET is that bad. In fact, Ultima 5 NES is borderline unplayable, and I'm not even sure if the word "borderline" applies here. This game is so bad it turned me off from even trying the PC version of Ultima 5 after acquiring the Ultima Collection. (PC Ultima 5 is much better, though like all Ultima games from 4 onward I have some complaints.)
* Ultima 6 SNES: Quite faithful to the original, albeit simplified. Unlike the NES games, the music is preserved in this game, and the graphics look nearly identical as well. There are some spells and other elements missing, however.
* Ultima 7 SNES: Completely different game. Many people consider this version to be bad, but it actually looks at least decent; interestingly, none of the issues with Ultima 7 I've complained about apply to this version (though it does have its own issues). It looks something like the Runes of Virtue games, albeit without the separate world map.
* Ultima Runes of Virtue (and its sequel): Released for the Game Boy (with RoV2 getting a SNES port), these games play more like Zelda than like an Ultima game.

There's also:
* Ultima: Escape From Mt. Dresh
* Two Worlds of Ultima games, Savage Empire and Martian Dreams (which are FREE on GOG, interestingly enough)

There was a point when Enix of America was considering releasing Dragon Quest 6 and Dragon Warrior 5. (Then again, the game is *more* anime than DQ5, given the upgraded graphics; just look at the main character!)

Chu Chu Rocket-Great puzzle/party/ multiplayer game on Dreamcast. Also one of it's first online games. Got a GBA version a few years later and then nothing. A blast to play with 3 other people.

Perfect Dark-Hardly obscure but fallen by the wayside for sure. The N64 game I have fond memories of, and I think got an XBLA release on X360. There was a Gameboy game and at least one XBOX release(can't recall if there were more) before they realized Joanna Dark wasn't going to move Lara Croft level units. Kind of a shame since a Hitman type reinvention with lots of routes/options could be pretty good if it was done right.

Splatterhouse-I got the XBOX360 one the day it came out and Kmart gave me a 50% off coupon. I knew it probably wouldn't be good but whatever. It was fun for a bit and with a longer dev time a sequel could be great. Schlocky B-movie cult horror and death metal as a theme for an over-the-top violent beat-em' up seems like it could be amazing. Occult charms for buffs. Suplexing ravenous corpses into a meatgrinder. No censorship and just in bad taste. We don't need to pretend every game is aiming for a family friendly audience these days.

Dishonored-Not obscure at all but as far as I know there's nothing in the works. Only played the first one so far but the world building is fantastic. Steampunkish mixed with some occult on top of plague filled corrupt port city. Oh and you're basically a steampunk ninja assassin with some ancient folk-magic.So many layers of history and facets of different groups. You could write 10 stories in this world without even trying but it looks like they didn't handle it properly somehow.