The Most Obscure Game Series you can think of.

[Souleks]

Anyone ever heard of a little indie game: And Yet It Moves? Pretty cool, but I doubt it's as popular as Braid or Limbo or other indie games.
There's also Timesplitters, which I discovered recently, but never played.

That showed up in the Humble Indie Bundle a couple times I don't know if it counts anymore.

And Timesplitters?
That was my childhood.
along with Armored Core,Twisted Metal and the Resident Evil games.

I say...

Vanguard Princess!

It is a doujin fighting game.
You probably never heard of it
/adjust hipster glasses

 

[Flizzick]

Revenge of the Sunfish, though I don't think it's a series. Gotta wonder what the guy who made that game was smoking/ shooting/ snorting/ all of the above.

 

[Kae]

Custom Robo.

It was somewhat popular in Japan but it did not get any love in the west. I thought the GameCube and the DS games were solid.

None of my friends or anyone I know played them

Another Nintendo franchise that did not get the love it deserved.

I like Custom Robo, but I liked it better when I played the Japanese version of Custom Robo 2 at a friend's house and had no idea what the story was, because really I wouldn't be surprised if the reason why it isn't popular is because of how awful the story mode was for the GameCube version, seriously that story pisses me off so much, which is awful because I really wanted to unlock everything but I can't suffer through that idiotic thing and all those awful characters more than once, it's just so stupid, I hate it, a lot.

Anyone ever heard of a little indie game: And Yet It Moves? Pretty cool, but I doubt it's as popular as Braid or Limbo or other indie games.
There's also Timesplitters, which I discovered recently, but never played.

TimeSplitters is hardly obscure since it has a huge cult following, but you should play it, it's really quite awesome, I'd recommend 2 and 3 but if you can only play one definitely 3.

OT: Uh.. I really don't know I can think of quite a few but those weren't series, is Front Mission obscure? That's an Strategy RPG with mechs by squaresoft, it started on the SNES and I'm pretty sure a DS game came out not too long ago, uhmm other than that, maybe Last Blade? I never hear anybody speak about those games and LB2 is fighting game perfection, seriously everybody that likes fighting games should play that, and it's really easy to get into since you only have 3 attack buttons and the 4th one is just a parry, which though can very easily turn the battle around if used properly, but it's possible to ignore it completely and still do good.

 

[maninahat]

Are you Afraid of the Dark did a series of point and click adventure games. I've only played the one: "The Tale of Orpheo's Curse". You're unlikely to play that one though, unless you are willing to steal it or spend $120 on ebay, and then have the joy of trying to remember how MS DOS works.

 

[Lord_Jaroh]

I liked Nightmare Creatures, Seven Kingdoms and Warlords: Battlecry...

 

[malkavianmadman]

I would go with the original Exile trilogy from Spiderweb software

 

[CrazyBlaze]

Team Buddies. I got a hold of a copy of it when I was I kid and I played the living daylights out of that game. Would leave to see a sequel of some sorts to it but I doubt that will ever happen. and maybe this one isn't too obscure but the .hack series I think isn't super popular, which is a shame because I greatly enjoyed them.

 

[Owyn_Merrilin]

Betrayal at Krondor.

Though, that's not a series.

Hugo's House of Horrors. It's one of those old type in commands for the player to do kinda thing. Sorta like Zork, but with actual graphics.

Ah yes, that was a good one too. Never managed to finish the first one, but did the rest. *grumbles* That damn snake in Whodunit...

Actually, that one had a spiritual sequel in the form of Betrayal in Antara (the two are sometimes called "The Betrayal series" as a result) and a plotwise direct sequel but mechanics wise un-related game in the form of Return to Krondor, so I'd say it counts as a series.

OT: The VR Challenger games. /Really/ early 3D games, had a few entries in the early 90's, I'd say it counts. The one I had was called Spectre Challenger, for some bizarre reason.

<youtube=ahaHNOOQHSs> This is not quite the version I had; looks like a newer entry in the series, or at least some sort of deluxe version.

 

[Ruedyn]

I'm going to go with COD 1-3. Nobody I know has ever played any of them.

Why does my captcha want me to finish a Robert Frost poem?

 

[FalloutJack]

Nobody ever talks about Project Overkill, a game thoroughly entrenched in missions of death and destruction with some really freaky enemies.

 

[BanZeus]

This is going from games that I own: Magna Carta. I know no one who has even heard of these games.

*Raises hand* Of course, I used to be an obsessive collector of JRPGs before they all got Nomura'd.

*also raises hand* First one kind of sucked, but I heard the second was better.

y/n?

*also also hand* While I have mixed feelings about this game, it's still on my shelf and is therefore not the worst game I bought largely because it had "Atlus" on the box. That (dis)honor goes to Baroque for the PS2, which is so obscure I didn't realize it was part of a series until I looked it up on wikipedia just now.

Honorable mention to the Wizardry series which is much more popular and influential in Japan than in the west despite starting out over here.