The Hostile bundle presents an RPG and supplements based the Cepheus Engine which in turns is based on Classic Traveller. This is a science fiction RPG in a universe more along the lines of Alien, Outland and Blade Runner -- more gritty both in terms of dirty ships and violent deaths.

I expect these are LBB-sized books so letter-sized page count is probably half or less.

Hostile Rules (2017) - 239 pages
Hostile Setting (2021) - 321 pages

Introduction to Hostile, Technical Manual, Tool-Kots
Situation Reports x5

Gunlocker (2020) - 45 pages, compilation of previously published weapons
Hostile Reference Screen (0221) - 26 pages, screen and reference material

Explorers (2021) - 71 pages, scout book including a survey ship and 36 worlds
Dirtside (2019) - 65 pages, animals and environment
Colony Builder (2021) - 105 pages, build a colony

Alien Breeds (2018) - 41 pages, a specific xenomorph plus a sample colony and and adventure to tie them all together
Synthetics (2020) - 47 pages, clones and androids
Gunboats & Shuttles (2020) - 69 pages, a collection of small craft with deckplans
Marine Corps Handbook 2215 (2018) - 119 pages, description of a Marine Expeditionary Unit plus Marine character creation
Crew Expendable (2019) - 80 pages, space truckers with a sample ship, 36 NPCs, and random contract-creation tables

There is an rpg.net thread which started a few months ago but is now talking about the bundle. I read a couple of online reviews and although the reviewers liked the rpg and setting from the description it doesn't seem like something I'd buy. Guess I'll skip.