Various Worlds which have interceded onto the Prime Earth.

Valor vs Venom

Arrowverse

Green Arrow Oliver Queen	Black Canary Sarah Lance	Spartan John Diggle	Speedy Thea Queen	Arsenal Roy Harper

The Flash Barry Allen	Kid Flash Wallace West	The Flash Jay Garrick	Supergirl Kara Danvers	Captain Cold Leonard Snart

Heat Wave Mick Rory	Vibe Cisco Ramon	Killer Frost Caitlin Snow	Harrison Wells	Felicity Smoak

John Diggle	Sgt. Joe West	Iris West-Allen	John Constantine

World of Chaos

Godwheel

Lord Pumpkin	Necromantra Thanasi	Kutt Justin Kuttner	Pistol	Planet Class Hector Ortiz

Primevil

Valiant

Solar Phil Seleski	X-O Manowar Aric of Dacia	Turok Son of Stone	Bloodshot Michael Lazarus	Shadowman Jack Boniface

Pete Stanchek	Kris Hathaway	Flamingo Charlene Dupre	Zephyr Faith Herbert	Torque John Torkelson

Ax Octavio Gonzalez	Archer Obidiah Archer	Armstrong Aram Anni-Padda	Eternal Warrior Gilan Anni-Padda	Timewalker Ivar Anni-Padda

Agent Neville Alcott	Ninjak Colin King	Doctor Mirage Shan Sofia Fong-Mirage	Toyo Harada	Mothergod Erica Pierce Deceased.

X-O Commando Kazuyo Nakadai	X-O Commandos Spider Aliens

The Yarns of Basin City

During the California Gold Rush, the Roark family "imported" a large number of attractive European women to keep the miners happy, making a fortune and turning a struggling mining camp into a thriving, bustling city. Over the years, as the Roark family migrated into other areas of business and power, these women ended up forming the district of Old Town, the prostitute quarter of the city where they rule with absolute authority. In addition, the people charged with governing the city, most of them from the Roark line, remained in power for generations, running it as they saw fit.
Having became a watering hole for the criminal element in the deep West, partially due to the growth of Old Town, decades later it evolved into a gritty metropolis of scum and villainy, complete with corrupt police force, multiple types of organized crime.