The Usagin is a high end biomod that is a popular niche product in the Cosmic Era. The dedication required to become a bunnyperson is serious, as some of the mods are invasive and make some common tech devices no longer operational for the usagin.

A way to increase the danger of a monster through an unusual mechanic

An ancient race of nearly-humanoid spiders that have lived on the fringes of civilization for as long as recorded history.

Gijinkagrams are a niche anomaly in the Cosmic Era, and they can be eliminated by routine maintenance on high end electronic systems. 

"AAAAAAHH, it's a troll!"
"Protect the women and children! Grab your torches!"

"AAAAAAHH, it's a troll!"
"****head... we banned him five times and he keeps making new accounts about how he pwns all and that he>>>>>>>>>>>>>>>>>>>j00!"

The most common domestic companion animal of the Kel'Regar, the Kel'Mestath has been bred into a wide variety of sizes and roles. Humans and their allied species often think of them as similar to cats or dogs, a perspective that the Kel usually encourage, for the full understanding of the Mestath tends to cause a certain level of discomfort in many aliens, but especially that close ally, humans.

An ethereal/astral parasite that feeds on emotion

also known as a great goblin, dread goblin, or super goblin

A highly transient form of digital life

A slowly growing bomb in the CogNet

A golem that packs a surprise!

The Karkos represent an attempt to create a bad guy race with almost no redeeming features, a true villainous species without resorting to established tropes or handwaving.

An Abnegator is a synth or augmented human who has had the misfortune of being fitted with an emotion radiator

A delicacy unique to the Tarkis Desert.

Or Bearshrews if you prefer. The debate rages on among naturalists. Both names are used interchangeably for these creatures.

Seriously - why hasn't one or another Artificial Intelligence simply taken over? In any setting that is in a close or more distant future, the possibility of a machine that is able to learn and grow without biological restraints brings up the question.

Inspired by Carrion Crawlers, Gelatinous Cube , Owl  Bear and the Stirge

"You see, there was this contest ......"

A bit of fluff for your game

Monsters designed for O&D but could easily be used for other games. A bare bones Bestiary.

Hell Hags are thankfully rare, incredibly rare, and the appearance of one means that the world has net decreased in number of hags by two