For me it was the original Classic Traveller, before hard science bogged everything down with books full of charts and tables for every conceivable question. A simple, adaptable system. Not sure the players reacted that way though, D&D was very pervasive in those days and dominated the preferable styles of gaming

Well, there's
Tunnels and Trolls (honestly, probably not the best but really cool from a history-of-the-hobby perspective)

BESM (Big Eyes, Small Mouth anime RPG); it's pretty much Tri-Stat

Genre Diversion System from Précis Intermedia: simple 2D6 system that comes in both a generic system (Genre Diversion System 3 core rules), and in prepackaged settings;
Earth AD=post apocalyptic, Coyote Trail=Cowboys and Indians, Blood Shadows=urban fantasy/horror (there's probably more but that's just what I remember of the dome)

Cepheus (OGL Traveller)

Swords and Six-siders; boils down OSR style D&D to a single D6 and does a pretty good job of it.

Spooktacular: retro clone of the Ghostbusters rpg

The various AGE RPGs (Dragon Age, Fantasy AGE, Modern AGE, and I think Blue Rose)

The Fantasy Trip (which recently was brought back into print by SJGames--though they're on the "Red" list, be forewarned).  That system was very rules-lite, but I had a blast playing it.  Very shallow learning curve.  GURPS essentially took the same mechanic but fleshed it out to the Nth degree.  I'm still a fan of both, despite SJGames direction...though for future purchases I'll probably go with eBay rather than directly dealing with the company.

And of course, as many have mentioned, Traveller and it's derivatives.  I spend many an our with CT, even outside of gaming with others, just having a blast seeing if a character would survive character generation.   

Quote from: caldrail on September 07, 2022, 10:42:26 AM
For me it was the original Classic Traveller, before hard science bogged everything down with books full of charts and tables for every conceivable question. A simple, adaptable system. Not sure the players reacted that way though, D&D was very pervasive in those days and dominated the preferable styles of gaming

Indeed.  Shortly after getting OD&D White Box in the late 70s, I got 1st Edition LBB's for Classic Traveller.  At first I was confused--"it's referring to how many dice to roll, but what kind of dice?!  I felt stupid when I realized it was good old "normal" dice.  But being exposed to those different systems, though I loved OD&D, and later AD&D (1st Ed), I always felt it was needlessly complicated with all those different dice (not to mention "Gyaxian Prose" in rule writing).

Quote from: Osman Gazi on September 07, 2022, 01:05:17 PM

Quote from: caldrail on September 07, 2022, 10:42:26 AM
For me it was the original Classic Traveller, before hard science bogged everything down with books full of charts and tables for every conceivable question. A simple, adaptable system. Not sure the players reacted that way though, D&D was very pervasive in those days and dominated the preferable styles of gaming

Indeed.  Shortly after getting OD&D White Box in the late 70s, I got 1st Edition LBB's for Classic Traveller.  At first I was confused--"it's referring to how many dice to roll, but what kind of dice?!  I felt stupid when I realized it was good old "normal" dice.  But being exposed to those different systems, though I loved OD&D, and later AD&D (1st Ed), I always felt it was needlessly complicated with all those different dice (not to mention "Gyaxian Prose" in rule writing).

I was just thinking that with only a couple of exceptions, I could not tell you what dice a system uses. LOL

Quote from: Jam The MF on September 05, 2022, 05:50:37 PM
I am embracing playing and running D&D my way.

Everything is based upon d6 rolls. 
Either 1d6 or 2d6, for all resolution mechanics. 
Hit Points for PCs, NPCs, and Monsters; are based upon d6s.
All Damage is based upon d6s.
Target Numbers are either a 4, 5, or 6.
I use Advantage / Disadvantage a lot.
The Mighty d6 can do it all.

Basically you are describing mostly what Swords & Six-siders is.   

https://www.pigames.net/store/product_info.php?cPath=137&products_id=1049

i use openD6 for everything, only rules i play with, imho is the best yes.

Quote from: Osman Gazi on September 07, 2022, 12:54:30 PM
The Fantasy Trip (which recently was brought back into print by SJGames--though they're on the "Red" list, be forewarned).  That system was very rules-lite, but I had a blast playing it.  Very shallow learning curve.  GURPS essentially took the same mechanic but fleshed it out to the Nth degree.  I'm still a fan of both, despite SJGames direction...though for future purchases I'll probably go with eBay rather than directly dealing with the company.

I was about to mention TFT until I saw this. I was very happy it came back.

GURPS did expand on it and even followed the release path with Man-to-Man fitting where Melee did then Orc Slayer fitting in where Death Test did.

I've considered from time to time running GURPS trip which would cut down the GURPS combat rules to Melee level and having skills only purchased at attribute level and multiple level advantages/disadvantages buyable only at one level (not sure if min/mid/max, though).

Simple Superheroes which I designed uses only d6s. (Sometimes when I run Planetary or Cosmic using d12s just to mix it up.)

Talents are rated 2-5, so you are generally rolling 2-5 dice. Each die can generate a success. Basic successes are 3+ -- it's supers so getting a success should be easy.

Rolls are opposed since all manner of interesting Talent might work against another given the situation (when acting against other supers). 2's and 1's get discarded and the highest and then 2nd highest, etc dice are compared, with defenders win on ties.

Each die can generate a success, which could be Lifepoints of damage, or might setup a condition. Frosto might get 3 successes against Thunderfist to freeze him to the floor. Thunderfist would then need to generate 3 successes to escape.

It's very flexible and easy to adjudicate (I'm highly biased of course.) We're getting ready for a 2nd print run right now

Risus, but it is too complex for my tastes.

Also Chainmail, but it is too modern for me.

Started to look at OVA again since it has a fun d6 dice mechanic, but -ugh- there is something about character creation (or at least the examples) that appears absolutely broken to me.  I might have to write up my own character design spread sheet to fully grok the system.

Define best?

For one group that would be gurps. For another its WEG's Star Wars, for others its Tunnels & Trolls.

I've heard a few times people claiming d6 Space is a good successor to Star Wars but never actually seen it yet.

For me Shadowrun is a pretty solid d6 system. Least till 2nd ed. Past that it gets iffy.

I thought the d6 system for the odd Metamorphosis Alpha RPG was interesting. But not explained well.

So for me Shadowrun is still one of the best.

Also for an oracle system RPG FU is the best.

Well, there are a lot.
My favourites:

Feng Shui
Traveller/Cepheus Engine
Gurps
Over the Edge

Quote from: jeff37923 on September 05, 2022, 02:35:52 PM
WEG d6 Star Wars is hard to beat, the only one that uses just d6 and supersedes it is Traveller.

Yeah for me I flip flop on whether Traveller or the fanmade Revised, Expanded and Updated SWd6 rules are the best d6 rules. I think I gravitate more towards Traveller because the character creation is so awesome and unique. I have no idea why other games didn't steal it tbh.

Like mentioned several times, WEG Star Wars, only played it once looong time ago. The only memory of it is this:
"Wow, I never knew d6 system could be so great"

Mouse Guard, I know it seems like a game for kids but it ain´t. I had my doubts until I tried it. It is a peculiar
experience to play a small knight-like mouse fighting against far bigger opponents, foxes, owls, snakes, badgers to
safeguard your kin, traderoutes and community. A lot of people seems to like the Burning Wheel system. Though if
you are sentitive to the SJW-stuff, then if I remember correct, it was on the SJW bandwagon (?)

Dungeon World or any other Powered By Apocalypse, really simple, really deadly and the rules can be used in just
about any kind of game world and a ton of those are available in DriveThroughRPG for cheap. Dungeon World I´v
played several sessions and Apocalypse World for only one session, ran by Vincent Baker himself. Don´t know the
man personally, and I don´t know whether he was for SJW or not. Some other designers using the system are though,
I don´t know whether that is a deal breaker for you or not. Only thing I kind of miss in Powered by Apocalypse is
that you can´t develop the character far until you kind of have to retire the character (if I remember correct)

Shadowrun, love the world (mostly, SJW though) and partly the rules, dicepools are handy, but it gets bogged down in initiative
requence without an app (there is one available) and each profession has their own rules, which kind of breaks the game.
2nd edition was mentioned previously, some say the 3rd is the best, I honestly don´t know. I only have experience
of the Anniversary and 5th edition. There are quite a few hacks for it to be ported to other systems which are not d6 though.