Pokemon Diamond/Pearl
Let me show you them.
Pokemon Diamond/Pearl: Breeding
Pokemon Diamond/Pearl: Natures
Pokemon Diamond/Pearl: Stealing
Pokemon Diamond/Pearl: Shinies
Pokemon Diamond/Pearl: Battle Items
Pokemon Diamond/Pearl: Effort Values
Pokemon Diamond/Pearl: Types
Pokemon Diamond/Pearl: Abilities

A Practical Guide to NetHack
Entirely redundant.
New Player's Guide
Armor
Food
Gems
Magic Items
Monsters
Tools
Weapons

Miscellaneous
I'm always surprised to find anyone reads these at all.
Civilization IV (PC)
E.V.O.: The Search For Eden Walkthrough (SNES)
Final Fantasy Tactics Advance (GBA)
Mega Man 2 (NES)
Monster World IV (Genesis)
Dungeons & Dragons: Warriors of the Eternal Sun (Genesis)