I think it's inevitable that we'll end up covering books for third-party games on Sega systems. There's loads, which is why until now the focus has been on Sega developed/published-games, but some are so rare it would be a shame not to document them in some form. Whether they'll all get pages, I can't say.
Some of this content might be destined for Retro CDN.
Japan
Master System
Mega Drive
Mega-CD
Game Gear
Saturn
Dreamcast
Multi-platform
US
Master System
Mega Drive
Ballz 3D Official Strategy Guide
Disney's Pocahontas Official Game Guide
Double Dragon V: The Shadow Falls Official Strategy Guide
Mortal Kombat II Official Power Play Guide
NBA Jam Official Player's Guide
Official Game Book: Toy Story
Official Game Secrets: Boogerman
Official Mortal Kombat 3 Fighters' Kompanion
Official Mortal Kombat 3 Pocket Kodes
Official NBA Hang Time Player's Guide
Official Player's Guide: Super Street Fighter II
Street Fighter II' Turbo Hyper Fighting Strategy Guide
Totally Unauthorized Guide to Super Street Fighter II
Troy Aikman Football Official Playbook
Mega-CD
Dungeon Master II Official Strategy Guide
Heimdall: The Official Strategy Guide
Lunar: The Silver Star - The Official Strategy Guide
Popful Mail: The Official Strategy Guide
Rise of the Dragon Hintbook for Sega CD
Vay for Sega CD: The Official Strategy Guide
Game Gear
Saturn
Croc: Legend of the Gobbos Official Game Secrets
GameFan's Die Hard Trilogy Strategy Guide
Gex Official Game Secrets
Night Warriors (GameFan books)
Totally Unauthorized Hexen Strategy Guide
Dreamcast
Industrial Spy: Operation Espionage: The Official Strategy Guide
NFL Blitz 2000 Official Strategy Guide
Official Blue Stinger Strategy Guide
Prima's Official Strategy Guide: Centipede
Prima's Official Strategy Guide: Dead or Alive 2
Prima's Official Strategy Guide: Draconus Cult of the Wyrm
Prima's Official Strategy Guide: Evolution 2
Prima's Official Strategy Guide: Half-Life
Prima's Official Strategy Guide: Legacy of Kain: Soul Reaver
Prima's Official Strategy Guide: NFL Blitz 2000
Prima's Official Strategy Guide: Omikron: The Nomad Soul
Prima's Official Strategy Guide: Power Stone
Prima's Official Strategy Guide: Rayman 2: The Great Escape
Prima's Official Strategy Guide: Ready 2 Rumble Boxing
Prima's Official Strategy Guide: Ready 2 Rumble Boxing Round 2
Prima's Official Strategy Guide: Resident Evil: Code Veronica
Prima's Official Strategy Guide: Silver
Prima's Official Strategy Guide: SoulCalibur
Prima's Official Strategy Guide: Star Wars Demolition
Prima's Official Strategy Guide: Star Wars Episode I Racer
Prima's Official Strategy Guide: Super Magnetic Neo
Prima's Official Strategy Guide: Tomb Raider Chronicles
Prima's Official Strategy Guide: Tomb Raider: The Last Revelation
Prima's Official Strategy Guide: Tom Clancy's Rainbow Six
Prima's Official Strategy Guide: Tom Clancy's Rainbow Six Rogue Spear
Prima's Official Strategy Guide: Toy Commander
Prima's Official Strategy Guide: Ultimate Fighting Championship
Ready 2 Rumble Boxing Official Strategy Guide
Slave Zero Official Strategy Guide
Street Fighter Alpha 3 Official Fighting Guide
Multi-platform
Action Series Strategies for Mortal Kombat
GamePro's Official Mortal Kombat Strategy Guide
GamePro Official Player's Guide: Batman Forever: The Video Game
GamePro Presents Primal Rage: Official Player's Guide
Judge Dredd: The Official Strategy Guide
The Lion King OFficial Game Book
Mortal Kombat Fighter's Kompanion
Mortal Kombat II Official Fighter's Kompanion
Mortal Kombat II Official Player's Guide
Mortal Kombat 3 Player's Guide
MTV's Beavis and Butthead Cheater's Guide
NBA Jam: Tournament Edition Super Book
Official Player's Guide: NBA Jam: Tournament Edition
Official Player's Guide: Pitfall: The Mayan Adventure
Official Player's Guide: Road Rash 3
Official Ultimate Mortal Kombat 3 Fighter's Kompanion
Official Ultimate Mortal Kombat 3 Pocket Kodes
Totally Unauthorized Primal Rage
UK
Master System
Mega Drive
Street Fighter II' Expert Player's Handbook
Super Street Fighter II Official Players Guide (Capcom/Gamepro ISSN 1357-6135)
Mega-CD
Game Gear
Saturn
Dreamcast
Official Acclaim Strategy Guide: Fur Fighters
France
Dreamcast
La Bible des Codes des Jeux Vidéo
Le Guide Officiel: Rayman 2: The Great Escape
Le Guide Stratégique Officiel Prima: Tomb Raider sur les Traces de Lara Croft
Specific games
Earthworm Jim 2: Official Game Secrets
Code books and magazine supplements for Retro CDN
US
- Blockbuster Secret Codes '98
- Blockbuster Secret Codes 2001 Volume 2
- GameFan's Ultimate Code Book
- GamePro Hot Tips: Adventure Games
- GameShark Pocket Power Guide 8th Edition
- Secret Codes 2001
- Secret Codes 2K1
- Tips & Tricks 1999 Video Game Codebook
- Tips & Tricks Holiday 2003 Codebook
- Tips & Tricks Super Video-Game Codebook
- The Ultimate Code Book: 2001 Edition
- The Ultimate Video Game Code Book (GamePro)
UK
- The Complete Sega & Nintendo Game Busting Guide
- The Official Computer and Video Games Tips Book
Magazine supplements
CVG
- Rock Hard Book of Tips
- Sega superstars volume 1
GamesMaster
- The Greatest Tips Book in The World Ever...
- The Greatest Tips Book in The World Ever... 2
- The Greatest Tips Book in The World Ever... 3
- The Greatest Tips Book in The World Ever... 4
- The Greatest Tips Book in The World Ever... 5
- The Greatest Tips Book in The World Ever... 6
- The Greatest Tips Book in The World Ever... 7
- The Greatest Tips Book in The World Ever... 8
- The Greatest Tips Book in The World Ever... 9
- The Greatest Tips Book in The World Ever... 10
- The Greatest Tips Book in The World Ever... 11
- The Greatest Tips Book in The World Ever... 12
- The Greatest Tips Book in The World Ever... 13
- The Greatest Tips Book in The World Ever... 14
- The Greatest Tips Book in The World Ever... 15
- The Greatest Tips Book in The World Ever... 16
- The Greatest Tips Book in The World Ever... 17
- The Greatest Tips Book in The World Ever... 18
- The Greatest Tips Book in The World Ever... 26
- The Greatest Tips Book in The World Ever... 27
- The Greatest Tips Book in The World Ever... 28
- The Greatest Tips Book in The World Ever... 29
- Secret Code Manual
- Supa Tips No.1
- Supa Tips No.2
- Supa Tips No.3
- Supa Tips No.4
- Supa Tips No.5 (issue #99)
- Tips 2 The Sequel
- Tips overload
- Top 100
- The Winner's Handbook
- Your Most Wanted Tips (No. 3)
- Your Most Wanted Tips (No. 6)
- Your Most Wanted Tips (No. 7)
- Your Most Wanted Tips (No. 10)
- Your Most Wanted Tips (No. 14)
- Your Most Wanted Tips (No. 15)
- Your Most Wanted Tips (No. 16)
- Your Most Wanted Tips (No. 19)
- Your Most Wanted Tips Xmas Special
MegaTech
- Complete Technique Zone (December 92)
Sega Force
- Street Fighter II Streets of Rage II The Novels
- Tips Force Super Smash TV
VHS
Specific games
- Desert Strike novel
- Road Rash novel
???
- The Pocket Book of Saturn Hints & Tips
France
- CD Consoles La Compil des Tips (213 PS1 72 N64 15 DC)
Japan