Crossover Guide
Some quests, like e.g. PokémonQuest and Pomanticar, not only share the same continuity (the PokémonQuest Universe), but also some or all of their events happen simultaneously. The lists below are an attempt to reconstruct the order they happened in. Threads marked with * were run at the same time and have simultaneous events. Threads are listed in approximately the order that they were created.
Diveverse
Including: DiveQuest / PaladinQuest / Knight Blades / GiftQuest
DQ Chapter 1: The Tragic Prince
DQ Chapter 2: Born Bad
DQ Chapter 3: Not Buried Deep Enough
DQ Chapter 4: High Roller
DQ Chapter 5: Something in the Way
DQ Chapter 6: About a Girl
DQ Chapter 7: Build High
DQ Chapter 8: Nobody Home
DQ Chapter 9: Buried Alive
DQ Chapter 10: Wishful Thinking
DQ Chapter 11: Nobody's Hero
DQ Chapter 12: Nailed
PQ: PaladinQuest
KB Chapter 1: The Fighting Spirit
KB Chapter 2: The Great Divide
KB Chapter 3: The Sun Underground
KB Chapter 4: The Double Edge
KB Chapter 5: The Forgotten Harmony
KB Chapter 6: The Four Walls
KB Chapter 7: The Ultimate Swordsman
KB Chapter 8: The Last Laugh
DQ Chapter 13: Lucky
DQ Chapter 14: Hello, My Treacherous Friends *
KB Chapter 9: The Littlest Feeling *
KB Chapter 10: The Wilting Flower
KB Chapter 11: The Forgotten Dance
KB Chapter 12: The King Below
KB Chapter 13: The Bleeding Heart
DQ Chapter 15: Bad Harmony *
KB Chapter 14: The Mysterious Stranger *
GQ: GiftQuest
GQ: GiftQuest II
KB Chapter 15: The Fire Inside
KB Chapter 16: The Precarious Concord
KB Chapter 17: The Dying Storm
KB Chapter 18: The Mourning Youth
KB Chapter 19: The Fair Interest
DQ Chapter 16: Vengeance
DQ Chapter 17: Forever
KB Chapter 20: The Effort's Reaping
KB Chapter 21: The Blind Duty
KB Chapter 22: The Dearest Gesture
DQ Chapter 18: Hunting Bears
KB Chapter 23: The Missing Component
DQ Chapter 19: Head On *
KB Chapter 24: Of Great Design *
DQ Chapter 20: Breed
DQ Chapter 21: The Pretender
DQ Chapter 22: Stuck in The Middle
DQ Chapter 23: Prove Yourself
DQ Chapter 24: Czar
DQ Chapter 25: We're Not Alone
DQ Chapter 26: Sex and Dying in High Society (active)
Rastin-Vresch Continuity
Including: Kara Quest / NicQuest / BlazeQuest / Apocalyption / The Protagonist Dies
Kara Quest: Chapters 1-2
Kara Quest: Chapter 3
Apocalyption: Chapter 1
Kara Quest: Interlude
Kara Quest: Chapter 4 *
Nic Quest: Chapters 1-2 *
Kara Quest: Chapter 5
Apocalyption: Chapters 2-4
The Protagonist Dies: Prologue
Apocalyption: Chapters 5-6
The Protagonist Dies: Chapter 1
Blaze Quest: Chapter 1
The Protagonist Dies: Chapter 2
Nic Quest: Chapter 3
Apocalyption: Chapters 7-9
The Protagonist Dies: Chapter 3
Nic Quest: Chapter 4
Apocalyption: Chapters 10-12
The Protagonist Dies: Chapter 4
The Protagonist Dies: Chapter 5
Nic Quest: Chapter 5
Apocalyption: Chapters 13-14
PokémonQuest Universe
Including: PokémonQuest / Pomanticar / PQ Report / Shed a Tear / Pokémon Quest Gaiden / Krabby Quest / Rattata Quest
[1] PokemonQuest Chapters 1+2
[2] PokemonQuest Chapter 3
[3] Pomanticar
[4] PokemonQuest Chapter 4
[5] PQ Report
[6] Shed a Tear
[7] Pokemon Quest Gaiden
[8] Ratatta Quest
[9] Krabby Quest
Mana Ritual / Unforgotten
Mana Ritual Chapter 1: Finding A Teacher
Mana Ritual Chapter 2: Helpless or Helpful
Mana Ritual Chapter 3: Come To The Party
Mana Ritual Chapter 4: Creationism
Mana Ritual Alternation 1: All Alone
Unforgotten Passage 1: Blank Slate
Unforgotten Passage 2: Decision *
Mana Ritual Chapter 5: Info Dump *
Mana Ritual Chapter 6: Pushed Too Far
Unforgotten Chapter 3: Royally Screwed Up