Strange Tales Across the Worlds: Am I Supposed to Fight These Things?

I transmigrated, and you say I'm Gudako? Now we're heading to the Lostbelts?

With a walkthrough, this should be easy.

First Lostbelt: The Crumbling Empire of Yore: The Despairing Black Sun (Warhammer 40,000)

Second Lostbelt: The Savior Maiden and the Circle of Reason: Puella Magi Madoka Magica

Third Lostbelt: The Fantastical City of Technology: A Certain Magical Index

Fourth Lostbelt: The Infinite Dreamlike Library: Umineko When They Cry

Fifth Lostbelt: A World of Despair and Darkness: The Giants of Light Stand Tall Upon the Earth

Sixth Lostbelt: An Unchanging Fate, the One and Only Eternal Lord: The Creator, Ince, Descends

Seventh Lostbelt: The Final Chapter: Stellar Sea Judgment, Aether Phase Engine

Eighth Lostbelt: The Fall of Axis: The Counterattack of the Super Robots

Ninth Lostbelt: The Battle to Redeem the Xiling Abyss: Saving the Ruined, Dark Abyssal Empire

Tenth Lostbelt: The Ultimate Cosmic Battle of the Martial Gods: Unspeakable, Unspeakable, Turn

Eleventh Lostbelt: The Strife of Great Beings: The Righteous War

Twelfth Lostbelt: The Devil's Perfect Human Paradise: The Heavenly Land of Illusions

Thirteenth Lostbelt: SCP-4555: The Time When We Are Omnipotent

Fourteenth Singularity: The Bewildering World Overrun by the Bizarre: Danuo

Fifteenth Lostbelt: The World of the Divine Box: The Transcendent Realm of the Great One

Sixteenth Lostbelt: The Final Return: The Dao, Haotian

Seventeenth Lostbelt: Onstage and Off, It Is Actually Seven: The Seven-Cornered Devourer of Primordial Spirits

Eighteenth Lostbelt: The Writhing Chaos of an Alien Evil God: Cthulhu

Nineteenth Lostbelt: The Great One's Dream of Returning Home, the Dawn of Creation: The Destruction of Taiyi and the Savior, Mingzun