Scott has published dozens of short stories and novellas. Many are set within the Siglerverse (and specifically the GFL era), while others are stand-alone, in stand-alone series, or even tie-in to other media properties.
The world of Hunter Hunterson exists outside of the SiglerVerse, where the supernatural does not explicitly exist. The Hunterson War Journals allow Scott to play in a world with ghosts, vampires, and other things that go bump in the night.
I have not read this series yet, but from the Siglerpedia, "in the Apocalypse Triptych, a group of hunters in the American Midwest are interrupted from their Deer Camp vacation by the sudden and abrupt invasion of hostile aliens."
The world has been affected by an alien pathogen that wants nothing less than to claim the Earth as it's own sixth planet, and plans to infect even more worlds using our planet as a launchpad. Sigler has written for other media tie-ins. He has 2 short stories and a novel in the Aliens universe
A bronze age civilization lives on a small island-continent called Ataegina, but it's an island with an infestation of xenomorphs. A young woman comes of age in this epic tale of a primitive society vs the Aliens, but she's only armed with bronze spears and shields!
Siger's story Dangerous Prey is set on the planet LV426. As the Colonial Marines attack their home, Dangerous Prey is the story of one Xenomorph as it tries to protect its family from these attackers. It's also the very first story ever told from the point of view of an Alien Xenomorph...
A tale of Ataegina is a short story set in the world of Ataegina, the release date of this anthology is March 2022.
Coming in May 2022, this anthology contains the story "Dead Man's Switch".Outside of Aliens, Scott has even played in a few other sandboxes.