On System Neutrality
The vast majority of the content on this site is designed to be system neutral (sometimes called system agnostic). I like writing most about concepts and story, characters and creatures and locales, and I’m a fan of providing those elements without official statblocks — I leave it up to individual Game Masters to stat those elements out in ways that work for their particular game.
There’s advantages to this. If you use one of my monsters in your game, you could use it as a minor filler encounter for low-level characters, or you could use it as a challenging final battle for experienced adventurers, depending on what your game needs. In that way, I get to create a versatile toolbox for other DMs that allows this content to be used at any point in the campaign.
That also means that most of the content on this site can be used with any tabletop RPG of your choice, even if you aren’t playing Dungeons and Dragons. Most of the content should be usable in Pathfinder or GURPS or Savage Worlds or whatever system you and your game group prefer.
That said, when I do post statted elements or house rules that modify an existing ruleset, they should be assumed to be written for the Dungeons and Dragons 3.5 ruleset.
Why D&D 3.5?
D&D 3.5 is the ruleset I’m most familiar with. It’s what I grew up playing, and all the content I’ve created was designed with 3.5 in mind. For the most part, all of that content should be compatible with Pathfinder 1E with minimal adjustment. And hey, I like supporting older editions of a game. Every iteration of Dungeons and Dragons is worth playing, and I don’t like the idea of leaving an edition behind just because the parent company moved on and decided to stop supporting it.
The current most popular edition of Dungeons and Dragons is 5th Edition. I’ve heard good things, but I have little experience with that edition, so I don’t create content for it. Almost all of my content should be perfectly usable in 5e, but the crunchy numbers bits might need some adjusting. For this, WotC’s Conversions to D&D 5e pdf may be helpful.
When I do post system-specific content, I’ll include a little “For Your Game” block at the end of the post, noting the system it was designed for, and offering suggestions on how to incorporate it into your own game.