Cosmic Cutthroats (2017)

From the front cover:

A Psycheelic RPG of Dimension-Hopping Science-Fantasy Renegades.

From the introduction:

The interdimensional metropolis known as Uru Ulan was a wonder, a shining jewel of the multiverse. A stinking cesspit to some who lived in its gutters and ghettos, but even they have to admit, its shining towers and towering ziggurats are wondrous and beautiful.

Uru Ulan wasn’t the only city of its kind, though. Other sprawling transdimensional cities, jealous of its power and precedence, declared war on Uru Ulan. War raged across infinite realities. Any Realm that traded with Uru Ulan was destined to become a battlefield, and a thousand thousand such worlds were laid waste.

The Mirror War is over, but the destruction remains, and you’ve lived in the ashes. Maybe you grew up in a mystical forest with other elves, blaming the vast swathes of obliterated trees to a war between gods and demons. Maybe you’re a superhuman vigilante, who saw warring aliens come to your beloved city, and you did what you could, but thousands were left dead and whole city blocks destroyed. Maybe your space station on the frontier’s edge was obliterated by unknown invaders wielding unguessable, almost magical weapons, invaders from beyond a strange rift in space and time.

Much of your civilization has been destroyed, and you find yourself without a home. It’s time to go explore, and make a place for yourself in the unguessable Realms beyond. To make some friends, make some money, challenge yourself, and most of all, have a good time.