When comparing Dungeons & Dragons v3.5 / Pathfinder RPG vs Basic Dungeons & Dragons 5th Edition, the Slant community recommends Dungeons & Dragons v3.5 / Pathfinder RPG for most people. In the question“What are the best tabletop RPGs?” Dungeons & Dragons v3.5 / Pathfinder RPG is ranked 29th while Basic Dungeons & Dragons 5th Edition is ranked 47th. The most important reason people chose Dungeons & Dragons v3.5 / Pathfinder RPG is:
The D&D v3.x family was published under an Open Game License which encouraged third-party material. Two editions later, there is still a thriving market creating new 3.5-compatible resources.
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Pros
Pro Enormous pool of source material
The D&D v3.x family was published under an Open Game License which encouraged third-party material. Two editions later, there is still a thriving market creating new 3.5-compatible resources.
Pro Actively supported via Pathfinder RPG
When Wizards of the Coast discontinued D&D v3.5 development in favor of 4th Edition, Paizo took advantage of the Open Gaming License to publish an updated revision of the 3.x rules under the title Pathfinder RPG, which is still their flagship product. Notably, Pathfinder RPG has consistently outsold 4th Edition.
Pro Modular system encourages creativity
The D&D v3.x family is designed around building characters, monsters, magic items, etc., from small simple pieces. For each piece, any of countless others can be substituted, allowing near-infinite customization and variety.
Pro Many easy to comprehend books and other resources
Pro Perfect balance of DM storytelling and deeply granular rules.
All of the deep-dive rulebooks provide the option for endless complexity - go as far as you want, and you'll never run out of opportunities. However, the basic mechanic of "roll a d20 and add your bonus" is simple enough that the DM can tell stories, create worlds, and build adventures with their party.
3.5e is the perfect edition.
Pro Bounded Accuracy
Bounded Accuracy is a core design ideal of 5th Edition. In short, it means the numbers don't get too big; this lets weak challenges remain relevant for longer, and strong ones become survivable sooner. In practice, it also places more focus on a character's inherent abilities and less on magical equipment than has been the case in recent editions.
Pro Easiest tabletop RPG to find someone to play with
As D&D is the largest tabletop RPG franchise and played by most people, it is the easiest tabletop RPG to find players for.
Pro Encourages character immersion
Numerous core aspects of 5th Edition exist solely to encourage thinking in-character, including mechanical rewards for good roleplay and detailed character backgrounds with lasting effects in the game.
Pro Minimal but versatile rules
5th Edition strikes an impressive balance in keeping the rules simple without limiting the creativity of players.
Cons
Con Encourages character optimization outside of play
With so many options available to the player, and the almost unlimited ability to combine them, certain "character builds" are patently superior to others. Players who spend a lot of personal time poring over the rules can often create characters so powerful that players who don't optimize feel useless in games with those who do.
Con Casters are significantly more powerful than non-casters
Con Detailed simulation slows down gameplay
Due to countless situational modifiers, players and DM alike have to put a great deal of thought into decisions about position, order of actions, etc., to the point that six seconds (one combat round) of "in-game time" frequently takes half an hour or more of play time.
Con Very easy to build broken (overpowered / underpowered) characters
Con Lacks variety in various areas
In order to make the character creation fast and relatively simple in-depth customization options have been excluded from the basic ruleset. There's also a limited selection of character options (just 4 classes with a single sub-class), monsters, magic items, etc. The variety is to be found in the full game.
Con Still puts too much emphasis on spellcasters
The sword and sandal brigade, as well as the ever undervalued and undersupported Ranger class (Arcane Archer is under Fighter, not Ranger, where it belongs!), are still second fiddle to the magic slingers and rogues who are always overpowered.
Con Too easy to fall into the meatgrinder trap
Roleplaying falls by the wayside too easily as the murder-hobo set are catered to! Of course, it's also about the DM, however, majority of players want combat and that is exactly what D&D likes to provide - along with the archetypal and archetypical meat-grinder dungeon fest.