Outcast (2018)

From publisher blurb:

It’s been five hundred years since the aliens came and almost as long since they took the Earth away from us.

Now we live in the cracks and crannies of the galaxy with ten thousand other outcast species, scraping up everything we need to live day to day: water, food, even air.

At least we have The Network. The Imperial Races may own all the garden spots, but ninety-nine out of a hundred places it connects are too cold, too hot, too arid or just too all-around awful to interest them. That’s the stage we play on now. Maybe one day we’ll get our own back, but right now our business is survival.

Outcast is an OSR SF RPG using the free Cepheus Engine core rules or other similar game systems. Play as humans or one of five alien races, using any one of fifteen adventure seeds and eleven worlds as a starting point--or use the included rules to create your own.