Thought of some more ideas while playing with the Experimental branch and reading/watching/playing other science fiction stuff. For Infusion or whatever else comes next. Pretty long, so drink some caffeine before reading.
-A botanical lab researching and experimenting with old world plants, trying to modify existing varieties to survive underground without sunlight. Experiments worked a bit too well with mutated plants spilling out of the facility and into much of the surrounding caves. Animal life is abundant as well as several types of rare plants that can be harvested for crafting components and consumables. Also home to a few plant species that are carnivorous, parasitic, or just plain dangerous to be around for various reasons. Inspired by Crimson Meadow Horticulture Center and Vault 22 from Fallout: New Vegas.
-A psionics lab that was attempting to learn how exactly psionic mutations came to be and also how to artificially induce psionic potential. Now overrun by mutated brain monsters with limited physical power but powerful psionic abilities and who feed on the brain juices of intelligent creatures. Inspired by the Psi Reavers from System Shock 2 and the 1958 film "Fiend Without a Face".
-A tribe of degenerated humans that are descended from Biocorp personnel that were trapped deep underground and twisted by alien energies unleashed by a rift experiment gone horribly, horribly wrong. Has a primitive society that regularly engages in cannibalism, ritual scarification, implied incest and human sacrifice and generally makes the Sørmirbæren seem cultured and civilized in comparison. They fight with simple cudgels, blades, and spears made of scavenged metal, stone, and bones and they both worship and are terrified of a horrific being from another dimension that entered ours during the rift experiment. Inspired by H.P Lovecraft's various works.
-An extremely dark, treacherous region that has barely any natural light. Home to plenty of strange and deadly creatures and fungi, some of which are naturally bioluminescent and a few of which can use psionic abilities as a lure or even use bioluminescence as a weapon. Inspired by: the many deeper, darker biomes in Subnautica, Rock Bottom, the trench and the frogfish from Spongebob, Deepnest and the Ancient Basin from Hollow Knight, the caves region from Don't Starve, and the Shaded Citadel region from Rain World.
-A sentient, insane AI that cobbles together homemade robots from various scrap and junk and also turns people into horrific, murderous cyborgs. Inspired by SHODAN from system shock, the 1999 film "Virus", and the Claptrap Revolution expansion from Borderlands.
-A heavily armored rail tank type vehicle/boss that has a ton of firepower and is very hard to destroy. Inspired by the Panzer used by the Fourth Reich in Metro: 2033 and the Red Line Tank used by the Red Line in Metro: Last Light.
-An industrial facility very similar to Foundry but long abandoned. Located in a geothermically active area similar to the Blistering Shores and as a result was powered by geothermal energy. Was where stygian coins were printed and after you get the place operational again, you get the option to melt down supersteel plates to turn into money. Inspired by money.
-An enormous, bug creature/boss resembling an Earwig or a Whiptail Scorpion that can breath fire, leaves webs that scorch you if you touch them and has various fire based metathermic abilities including Plasma Beam. Inspired by that one scene in King Kong (2005) with all of the bugs and by Kong: Skull Island.
-Wererathound. Nuff said. Inspired by rathounds.
