>>514027513 is the best, most pure BN experience in my opinion. That one and 6 are generally considered the best, but 6, being the intentional final game in the series, has a LOT of mechanics to learn and I wouldn't suggest starting with that. Honestly, I'd start with the first game if you're interested, it's not that long and it's still fun.
>>51402985>>51403004>>514036404, however, is a trainwreck that almost killed the series. I guess they thought they could just coast on the previous successes and slapped it together with a shoestring budget.
