Not all of the entries are role-playing games, but all of them have immersive worlds or lore that I enjoy.
Generic & News
Diablo (series)
Dune (series)
- FED2k: Community around Dune 2, Dune 2000 & Emperor: Battle for Dune
Dwarf Fortress
Guides
- Dwarf Fortress Wiki
- Beginner's Guide (PCGamer)
- Dwarf Fortress Basics (Steam guide)
- Simple Dwarf Fortress Guide (2022) (Steam)
Tools
- Dwarf Fortress Wiki utilities list
- DF Hack (Steam version) + documentation
- Dwarf Therapist + Linux fix
Fallout (series)
KeeperRL
Minecraft
Resident Evil (series)
- Project Umbrella: Fansite with incredible amounts of material about all Resident Evil games
Starfield
- Starfield Recommended Mods: Personal list
The Elder Scrolls (series)
- Morrowind with fixes and graphical updates
- Oblivion Remastered Recommended Mods: Personal list
- Unofficial Elder Scrolls Pages: Oldest and best wiki of all the Elder Scrolls games, including Morrowind, Oblivion and Skyrim.